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Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs 

* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  xfs: use proper interfaces for on-stack plugging
  xfs: fix xfs_debug warnings
  xfs: fix variable set but not used warnings
  xfs: convert log tail checking to a warning
  xfs: catch bad block numbers freeing extents.
  xfs: push the AIL from memory reclaim and periodic sync
  xfs: clean up code layout in xfs_trans_ail.c
  xfs: convert the xfsaild threads to a workqueue
  xfs: introduce background inode reclaim work
  xfs: convert ENOSPC inode flushing to use new syncd workqueue
  xfs: introduce a xfssyncd workqueue
  xfs: fix extent format buffer allocation size
  xfs: fix unreferenced var error in xfs_buf.c

Also, applied patch from Tony Luck that fixes ia64:
  xfs_destroy_workqueues() should not be tagged with__exit
in the branch before merging.
This commit is contained in:
Linus Torvalds 2011-04-11 15:48:57 -07:00
parent a97b52022a 39411f81ee
commit 1e05ff020f
17 changed files with 531 additions and 507 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
fs/xfs/linux-2.6/xfs_buf.c
View File

@ -293,7 +293,6 @@ xfs_buf_allocate_memory(
size_t nbytes, offset;
gfp_t gfp_mask = xb_to_gfp(flags);
unsigned short page_count, i;
pgoff_t first;
xfs_off_t end;
int error;
@ -333,7 +332,6 @@ use_alloc_page:
return error;
offset = bp->b_offset;
first = bp->b_file_offset >> PAGE_SHIFT;
bp->b_flags |= _XBF_PAGES;
for (i = 0; i < bp->b_page_count; i++) {
@ -657,8 +655,6 @@ xfs_buf_readahead(
xfs_off_t ioff,
size_t isize)
{
struct backing_dev_info *bdi;
if (bdi_read_congested(target->bt_bdi))
return;
@ -919,8 +915,6 @@ xfs_buf_lock(
if (atomic_read(&bp->b_pin_count) && (bp->b_flags & XBF_STALE))
xfs_log_force(bp->b_target->bt_mount, 0);
if (atomic_read(&bp->b_io_remaining))
blk_flush_plug(current);
down(&bp->b_sema);
XB_SET_OWNER(bp);
@ -1309,8 +1303,6 @@ xfs_buf_iowait(
{
trace_xfs_buf_iowait(bp, _RET_IP_);
if (atomic_read(&bp->b_io_remaining))
blk_flush_plug(current);
wait_for_completion(&bp->b_iowait);
trace_xfs_buf_iowait_done(bp, _RET_IP_);
@ -1747,8 +1739,8 @@ xfsbufd(
do {
long age = xfs_buf_age_centisecs * msecs_to_jiffies(10);
long tout = xfs_buf_timer_centisecs * msecs_to_jiffies(10);
int count = 0;
struct list_head tmp;
struct blk_plug plug;
if (unlikely(freezing(current))) {
set_bit(XBT_FORCE_SLEEP, &target->bt_flags);
@ -1764,16 +1756,15 @@ xfsbufd(
xfs_buf_delwri_split(target, &tmp, age);
list_sort(NULL, &tmp, xfs_buf_cmp);
blk_start_plug(&plug);
while (!list_empty(&tmp)) {
struct xfs_buf *bp;
bp = list_first_entry(&tmp, struct xfs_buf, b_list);
list_del_init(&bp->b_list);
xfs_bdstrat_cb(bp);
count++;
}
if (count)
blk_flush_plug(current);
blk_finish_plug(&plug);
} while (!kthread_should_stop());
return 0;
@ -1793,6 +1784,7 @@ xfs_flush_buftarg(
int pincount = 0;
LIST_HEAD(tmp_list);
LIST_HEAD(wait_list);
struct blk_plug plug;
xfs_buf_runall_queues(xfsconvertd_workqueue);
xfs_buf_runall_queues(xfsdatad_workqueue);
@ -1807,6 +1799,8 @@ xfs_flush_buftarg(
* we do that after issuing all the IO.
*/
list_sort(NULL, &tmp_list, xfs_buf_cmp);
blk_start_plug(&plug);
while (!list_empty(&tmp_list)) {
bp = list_first_entry(&tmp_list, struct xfs_buf, b_list);
ASSERT(target == bp->b_target);
@ -1817,10 +1811,10 @@ xfs_flush_buftarg(
}
xfs_bdstrat_cb(bp);
}
blk_finish_plug(&plug);
if (wait) {
/* Expedite and wait for IO to complete. */
blk_flush_plug(current);
/* Wait for IO to complete. */
while (!list_empty(&wait_list)) {
bp = list_first_entry(&wait_list, struct xfs_buf, b_list);

27
fs/xfs/linux-2.6/xfs_message.c
View File

@ -28,53 +28,47 @@
/*
* XFS logging functions
*/
static int
static void
__xfs_printk(
const char *level,
const struct xfs_mount *mp,
struct va_format *vaf)
{
if (mp && mp->m_fsname)
return printk("%sXFS (%s): %pV\n", level, mp->m_fsname, vaf);
return printk("%sXFS: %pV\n", level, vaf);
printk("%sXFS (%s): %pV\n", level, mp->m_fsname, vaf);
printk("%sXFS: %pV\n", level, vaf);
}
int xfs_printk(
void xfs_printk(
const char *level,
const struct xfs_mount *mp,
const char *fmt, ...)
{
struct va_format vaf;
va_list args;
int r;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
r = __xfs_printk(level, mp, &vaf);
__xfs_printk(level, mp, &vaf);
va_end(args);
return r;
}
#define define_xfs_printk_level(func, kern_level) \
int func(const struct xfs_mount *mp, const char *fmt, ...) \
void func(const struct xfs_mount *mp, const char *fmt, ...) \
{ \
struct va_format vaf; \
va_list args; \
int r; \
\
va_start(args, fmt); \
\
vaf.fmt = fmt; \
vaf.va = &args; \
\
r = __xfs_printk(kern_level, mp, &vaf); \
__xfs_printk(kern_level, mp, &vaf); \
va_end(args); \
\
return r; \
} \
define_xfs_printk_level(xfs_emerg, KERN_EMERG);
@ -88,7 +82,7 @@ define_xfs_printk_level(xfs_info, KERN_INFO);
define_xfs_printk_level(xfs_debug, KERN_DEBUG);
#endif
int
void
xfs_alert_tag(
const struct xfs_mount *mp,
int panic_tag,
@ -97,7 +91,6 @@ xfs_alert_tag(
struct va_format vaf;
va_list args;
int do_panic = 0;
int r;
if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) {
xfs_printk(KERN_ALERT, mp,
@ -110,12 +103,10 @@ xfs_alert_tag(
vaf.fmt = fmt;
vaf.va = &args;
r = __xfs_printk(KERN_ALERT, mp, &vaf);
__xfs_printk(KERN_ALERT, mp, &vaf);
va_end(args);
BUG_ON(do_panic);
return r;
}
void

24
fs/xfs/linux-2.6/xfs_message.h
View File

@ -3,32 +3,34 @@
struct xfs_mount;
extern int xfs_printk(const char *level, const struct xfs_mount *mp,
extern void xfs_printk(const char *level, const struct xfs_mount *mp,
const char *fmt, ...)
__attribute__ ((format (printf, 3, 4)));
extern int xfs_emerg(const struct xfs_mount *mp, const char *fmt, ...)
extern void xfs_emerg(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
extern int xfs_alert(const struct xfs_mount *mp, const char *fmt, ...)
extern void xfs_alert(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
extern int xfs_alert_tag(const struct xfs_mount *mp, int tag,
extern void xfs_alert_tag(const struct xfs_mount *mp, int tag,
const char *fmt, ...)
__attribute__ ((format (printf, 3, 4)));
extern int xfs_crit(const struct xfs_mount *mp, const char *fmt, ...)
extern void xfs_crit(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
extern int xfs_err(const struct xfs_mount *mp, const char *fmt, ...)
extern void xfs_err(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
extern int xfs_warn(const struct xfs_mount *mp, const char *fmt, ...)
extern void xfs_warn(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
extern int xfs_notice(const struct xfs_mount *mp, const char *fmt, ...)
extern void xfs_notice(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
extern int xfs_info(const struct xfs_mount *mp, const char *fmt, ...)
extern void xfs_info(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
#ifdef DEBUG
extern int xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
extern void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
#else
#define xfs_debug(mp, fmt, ...) (0)
static inline void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
{
}
#endif
extern void assfail(char *expr, char *f, int l);

129
fs/xfs/linux-2.6/xfs_super.c
View File

@ -816,75 +816,6 @@ xfs_setup_devices(
return 0;
}
/*
* XFS AIL push thread support
*/
void
xfsaild_wakeup(
struct xfs_ail *ailp,
xfs_lsn_t threshold_lsn)
{
/* only ever move the target forwards */
if (XFS_LSN_CMP(threshold_lsn, ailp->xa_target) > 0) {
ailp->xa_target = threshold_lsn;
wake_up_process(ailp->xa_task);
}
}
STATIC int
xfsaild(
void *data)
{
struct xfs_ail *ailp = data;
xfs_lsn_t last_pushed_lsn = 0;
long tout = 0; /* milliseconds */
while (!kthread_should_stop()) {
/*
* for short sleeps indicating congestion, don't allow us to
* get woken early. Otherwise all we do is bang on the AIL lock
* without making progress.
*/
if (tout && tout <= 20)
__set_current_state(TASK_KILLABLE);
else
__set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(tout ?
msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT);
/* swsusp */
try_to_freeze();
ASSERT(ailp->xa_mount->m_log);
if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
continue;
tout = xfsaild_push(ailp, &last_pushed_lsn);
}
return 0;
} /* xfsaild */
int
xfsaild_start(
struct xfs_ail *ailp)
{
ailp->xa_target = 0;
ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild/%s",
ailp->xa_mount->m_fsname);
if (IS_ERR(ailp->xa_task))
return -PTR_ERR(ailp->xa_task);
return 0;
}
void
xfsaild_stop(
struct xfs_ail *ailp)
{
kthread_stop(ailp->xa_task);
}
/* Catch misguided souls that try to use this interface on XFS */
STATIC struct inode *
xfs_fs_alloc_inode(
@ -1191,22 +1122,12 @@ xfs_fs_sync_fs(
return -error;
if (laptop_mode) {
int prev_sync_seq = mp->m_sync_seq;
/*
* The disk must be active because we're syncing.
* We schedule xfssyncd now (now that the disk is
* active) instead of later (when it might not be).
*/
wake_up_process(mp->m_sync_task);
/*
* We have to wait for the sync iteration to complete.
* If we don't, the disk activity caused by the sync
* will come after the sync is completed, and that
* triggers another sync from laptop mode.
*/
wait_event(mp->m_wait_single_sync_task,
mp->m_sync_seq != prev_sync_seq);
flush_delayed_work_sync(&mp->m_sync_work);
}
return 0;
@ -1490,9 +1411,6 @@ xfs_fs_fill_super(
spin_lock_init(&mp->m_sb_lock);
mutex_init(&mp->m_growlock);
atomic_set(&mp->m_active_trans, 0);
INIT_LIST_HEAD(&mp->m_sync_list);
spin_lock_init(&mp->m_sync_lock);
init_waitqueue_head(&mp->m_wait_single_sync_task);
mp->m_super = sb;
sb->s_fs_info = mp;
@ -1798,6 +1716,38 @@ xfs_destroy_zones(void)
}
STATIC int __init
xfs_init_workqueues(void)
{
/*
* max_active is set to 8 to give enough concurency to allow
* multiple work operations on each CPU to run. This allows multiple
* filesystems to be running sync work concurrently, and scales with
* the number of CPUs in the system.
*/
xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_CPU_INTENSIVE, 8);
if (!xfs_syncd_wq)
goto out;
xfs_ail_wq = alloc_workqueue("xfsail", WQ_CPU_INTENSIVE, 8);
if (!xfs_ail_wq)
goto out_destroy_syncd;
return 0;
out_destroy_syncd:
destroy_workqueue(xfs_syncd_wq);
out:
return -ENOMEM;
}
STATIC void
xfs_destroy_workqueues(void)
{
destroy_workqueue(xfs_ail_wq);
destroy_workqueue(xfs_syncd_wq);
}
STATIC int __init
init_xfs_fs(void)
{
@ -1813,10 +1763,14 @@ init_xfs_fs(void)
if (error)
goto out;
error = xfs_mru_cache_init();
error = xfs_init_workqueues();
if (error)
goto out_destroy_zones;
error = xfs_mru_cache_init();
if (error)
goto out_destroy_wq;
error = xfs_filestream_init();
if (error)
goto out_mru_cache_uninit;
@ -1833,6 +1787,10 @@ init_xfs_fs(void)
if (error)
goto out_cleanup_procfs;
error = xfs_init_workqueues();
if (error)
goto out_sysctl_unregister;
vfs_initquota();
error = register_filesystem(&xfs_fs_type);
@ -1850,6 +1808,8 @@ init_xfs_fs(void)
xfs_filestream_uninit();
out_mru_cache_uninit:
xfs_mru_cache_uninit();
out_destroy_wq:
xfs_destroy_workqueues();
out_destroy_zones:
xfs_destroy_zones();
out:
@ -1866,6 +1826,7 @@ exit_xfs_fs(void)
xfs_buf_terminate();
xfs_filestream_uninit();
xfs_mru_cache_uninit();
xfs_destroy_workqueues();
xfs_destroy_zones();
}

228
fs/xfs/linux-2.6/xfs_sync.c
View File

@ -22,6 +22,7 @@
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_mount.h"
@ -39,6 +40,8 @@
#include <linux/kthread.h>
#include <linux/freezer.h>
struct workqueue_struct *xfs_syncd_wq; /* sync workqueue */
/*
* The inode lookup is done in batches to keep the amount of lock traffic and
* radix tree lookups to a minimum. The batch size is a trade off between
@ -431,62 +434,12 @@ xfs_quiesce_attr(
xfs_unmountfs_writesb(mp);
}
/*
* Enqueue a work item to be picked up by the vfs xfssyncd thread.
* Doing this has two advantages:
* - It saves on stack space, which is tight in certain situations
* - It can be used (with care) as a mechanism to avoid deadlocks.
* Flushing while allocating in a full filesystem requires both.
*/
STATIC void
xfs_syncd_queue_work(
struct xfs_mount *mp,
void *data,
void (*syncer)(struct xfs_mount *, void *),
struct completion *completion)
static void
xfs_syncd_queue_sync(
struct xfs_mount *mp)
{
struct xfs_sync_work *work;
work = kmem_alloc(sizeof(struct xfs_sync_work), KM_SLEEP);
INIT_LIST_HEAD(&work->w_list);
work->w_syncer = syncer;
work->w_data = data;
work->w_mount = mp;
work->w_completion = completion;
spin_lock(&mp->m_sync_lock);
list_add_tail(&work->w_list, &mp->m_sync_list);
spin_unlock(&mp->m_sync_lock);
wake_up_process(mp->m_sync_task);
}
/*
* Flush delayed allocate data, attempting to free up reserved space
* from existing allocations. At this point a new allocation attempt
* has failed with ENOSPC and we are in the process of scratching our
* heads, looking about for more room...
*/
STATIC void
xfs_flush_inodes_work(
struct xfs_mount *mp,
void *arg)
{
struct inode *inode = arg;
xfs_sync_data(mp, SYNC_TRYLOCK);
xfs_sync_data(mp, SYNC_TRYLOCK | SYNC_WAIT);
iput(inode);
}
void
xfs_flush_inodes(
xfs_inode_t *ip)
{
struct inode *inode = VFS_I(ip);
DECLARE_COMPLETION_ONSTACK(completion);
igrab(inode);
xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inodes_work, &completion);
wait_for_completion(&completion);
xfs_log_force(ip->i_mount, XFS_LOG_SYNC);
queue_delayed_work(xfs_syncd_wq, &mp->m_sync_work,
msecs_to_jiffies(xfs_syncd_centisecs * 10));
}
/*
@ -496,9 +449,10 @@ xfs_flush_inodes(
*/
STATIC void
xfs_sync_worker(
struct xfs_mount *mp,
void *unused)
struct work_struct *work)
{
struct xfs_mount *mp = container_of(to_delayed_work(work),
struct xfs_mount, m_sync_work);
int error;
if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
@ -508,73 +462,106 @@ xfs_sync_worker(
error = xfs_fs_log_dummy(mp);
else
xfs_log_force(mp, 0);
xfs_reclaim_inodes(mp, 0);
error = xfs_qm_sync(mp, SYNC_TRYLOCK);
/* start pushing all the metadata that is currently dirty */
xfs_ail_push_all(mp->m_ail);
}
mp->m_sync_seq++;
wake_up(&mp->m_wait_single_sync_task);
/* queue us up again */
xfs_syncd_queue_sync(mp);
}
STATIC int
xfssyncd(
void *arg)
/*
* Queue a new inode reclaim pass if there are reclaimable inodes and there
* isn't a reclaim pass already in progress. By default it runs every 5s based
* on the xfs syncd work default of 30s. Perhaps this should have it's own
* tunable, but that can be done if this method proves to be ineffective or too
* aggressive.
*/
static void
xfs_syncd_queue_reclaim(
struct xfs_mount *mp)
{
struct xfs_mount *mp = arg;
long timeleft;
xfs_sync_work_t *work, *n;
LIST_HEAD (tmp);
set_freezable();
timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
for (;;) {
if (list_empty(&mp->m_sync_list))
timeleft = schedule_timeout_interruptible(timeleft);
/* swsusp */
try_to_freeze();
if (kthread_should_stop() && list_empty(&mp->m_sync_list))
break;
/*
* We can have inodes enter reclaim after we've shut down the syncd
* workqueue during unmount, so don't allow reclaim work to be queued
* during unmount.
*/
if (!(mp->m_super->s_flags & MS_ACTIVE))
return;
spin_lock(&mp->m_sync_lock);
/*
* We can get woken by laptop mode, to do a sync -
* that's the (only!) case where the list would be
* empty with time remaining.
*/
if (!timeleft || list_empty(&mp->m_sync_list)) {
if (!timeleft)
timeleft = xfs_syncd_centisecs *
msecs_to_jiffies(10);
INIT_LIST_HEAD(&mp->m_sync_work.w_list);
list_add_tail(&mp->m_sync_work.w_list,
&mp->m_sync_list);
}
list_splice_init(&mp->m_sync_list, &tmp);
spin_unlock(&mp->m_sync_lock);
list_for_each_entry_safe(work, n, &tmp, w_list) {
(*work->w_syncer)(mp, work->w_data);
list_del(&work->w_list);
if (work == &mp->m_sync_work)
continue;
if (work->w_completion)
complete(work->w_completion);
kmem_free(work);
}
rcu_read_lock();
if (radix_tree_tagged(&mp->m_perag_tree, XFS_ICI_RECLAIM_TAG)) {
queue_delayed_work(xfs_syncd_wq, &mp->m_reclaim_work,
msecs_to_jiffies(xfs_syncd_centisecs / 6 * 10));
}
rcu_read_unlock();
}
return 0;
/*
* This is a fast pass over the inode cache to try to get reclaim moving on as
* many inodes as possible in a short period of time. It kicks itself every few
* seconds, as well as being kicked by the inode cache shrinker when memory
* goes low. It scans as quickly as possible avoiding locked inodes or those
* already being flushed, and once done schedules a future pass.
*/
STATIC void
xfs_reclaim_worker(
struct work_struct *work)
{
struct xfs_mount *mp = container_of(to_delayed_work(work),
struct xfs_mount, m_reclaim_work);
xfs_reclaim_inodes(mp, SYNC_TRYLOCK);
xfs_syncd_queue_reclaim(mp);
}
/*
* Flush delayed allocate data, attempting to free up reserved space
* from existing allocations. At this point a new allocation attempt
* has failed with ENOSPC and we are in the process of scratching our
* heads, looking about for more room.
*
* Queue a new data flush if there isn't one already in progress and
* wait for completion of the flush. This means that we only ever have one
* inode flush in progress no matter how many ENOSPC events are occurring and
* so will prevent the system from bogging down due to every concurrent
* ENOSPC event scanning all the active inodes in the system for writeback.
*/
void
xfs_flush_inodes(
struct xfs_inode *ip)
{
struct xfs_mount *mp = ip->i_mount;
queue_work(xfs_syncd_wq, &mp->m_flush_work);
flush_work_sync(&mp->m_flush_work);
}
STATIC void
xfs_flush_worker(
struct work_struct *work)
{
struct xfs_mount *mp = container_of(work,
struct xfs_mount, m_flush_work);
xfs_sync_data(mp, SYNC_TRYLOCK);
xfs_sync_data(mp, SYNC_TRYLOCK | SYNC_WAIT);
}
int
xfs_syncd_init(
struct xfs_mount *mp)
{
mp->m_sync_work.w_syncer = xfs_sync_worker;
mp->m_sync_work.w_mount = mp;
mp->m_sync_work.w_completion = NULL;
mp->m_sync_task = kthread_run(xfssyncd, mp, "xfssyncd/%s", mp->m_fsname);
if (IS_ERR(mp->m_sync_task))
return -PTR_ERR(mp->m_sync_task);
INIT_WORK(&mp->m_flush_work, xfs_flush_worker);
INIT_DELAYED_WORK(&mp->m_sync_work, xfs_sync_worker);
INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
xfs_syncd_queue_sync(mp);
xfs_syncd_queue_reclaim(mp);
return 0;
}
@ -582,7 +569,9 @@ void
xfs_syncd_stop(
struct xfs_mount *mp)
{
kthread_stop(mp->m_sync_task);
cancel_delayed_work_sync(&mp->m_sync_work);
cancel_delayed_work_sync(&mp->m_reclaim_work);
cancel_work_sync(&mp->m_flush_work);
}
void
@ -601,6 +590,10 @@ __xfs_inode_set_reclaim_tag(
XFS_INO_TO_AGNO(ip->i_mount, ip->i_ino),
XFS_ICI_RECLAIM_TAG);
spin_unlock(&ip->i_mount->m_perag_lock);
/* schedule periodic background inode reclaim */
xfs_syncd_queue_reclaim(ip->i_mount);
trace_xfs_perag_set_reclaim(ip->i_mount, pag->pag_agno,
-1, _RET_IP_);
}
@ -1017,7 +1010,13 @@ xfs_reclaim_inodes(
}
/*
* Shrinker infrastructure.
* Inode cache shrinker.
*
* When called we make sure that there is a background (fast) inode reclaim in
* progress, while we will throttle the speed of reclaim via doiing synchronous
* reclaim of inodes. That means if we come across dirty inodes, we wait for
* them to be cleaned, which we hope will not be very long due to the
* background walker having already kicked the IO off on those dirty inodes.
*/
static int
xfs_reclaim_inode_shrink(
@ -1032,10 +1031,15 @@ xfs_reclaim_inode_shrink(
mp = container_of(shrink, struct xfs_mount, m_inode_shrink);
if (nr_to_scan) {
/* kick background reclaimer and push the AIL */
xfs_syncd_queue_reclaim(mp);
xfs_ail_push_all(mp->m_ail);
if (!(gfp_mask & __GFP_FS))
return -1;
xfs_reclaim_inodes_ag(mp, SYNC_TRYLOCK, &nr_to_scan);
xfs_reclaim_inodes_ag(mp, SYNC_TRYLOCK | SYNC_WAIT,
&nr_to_scan);
/* terminate if we don't exhaust the scan */
if (nr_to_scan > 0)
return -1;

2
fs/xfs/linux-2.6/xfs_sync.h
View File

@ -32,6 +32,8 @@ typedef struct xfs_sync_work {
#define SYNC_WAIT 0x0001 /* wait for i/o to complete */
#define SYNC_TRYLOCK 0x0002 /* only try to lock inodes */
extern struct workqueue_struct *xfs_syncd_wq; /* sync workqueue */
int xfs_syncd_init(struct xfs_mount *mp);
void xfs_syncd_stop(struct xfs_mount *mp);

7
fs/xfs/quota/xfs_qm.c
View File

@ -461,12 +461,10 @@ xfs_qm_dqflush_all(
struct xfs_quotainfo *q = mp->m_quotainfo;
int recl;
struct xfs_dquot *dqp;
int niters;
int error;
if (!q)
return 0;
niters = 0;
again:
mutex_lock(&q->qi_dqlist_lock);
list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
@ -1314,14 +1312,9 @@ xfs_qm_dqiter_bufs(
{
xfs_buf_t *bp;
int error;
int notcommitted;
int incr;
int type;
ASSERT(blkcnt > 0);
notcommitted = 0;
incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ?
XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt;
type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
(flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
error = 0;

5
fs/xfs/quota/xfs_qm.h
View File

@ -65,11 +65,6 @@ extern kmem_zone_t *qm_dqtrxzone;
* block in the dquot/xqm code.
*/
#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
/*
* When doing a quotacheck, we log dquot clusters of this many FSBs at most
* in a single transaction. We don't want to ask for too huge a log reservation.
*/
#define XFS_QM_MAX_DQCLUSTER_LOGSZ 3
typedef xfs_dqhash_t xfs_dqlist_t;

2
fs/xfs/quota/xfs_qm_syscalls.c
View File

@ -313,14 +313,12 @@ xfs_qm_scall_quotaon(
{
int error;
uint qf;
uint accflags;
__int64_t sbflags;
flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
/*
* Switching on quota accounting must be done at mount time.
*/
accflags = flags & XFS_ALL_QUOTA_ACCT;
flags &= ~(XFS_ALL_QUOTA_ACCT);
sbflags = 0;

30
fs/xfs/xfs_alloc.c
View File

@ -2395,17 +2395,33 @@ xfs_free_extent(
memset(&args, 0, sizeof(xfs_alloc_arg_t));
args.tp = tp;
args.mp = tp->t_mountp;
/*
* validate that the block number is legal - the enables us to detect
* and handle a silent filesystem corruption rather than crashing.
*/
args.agno = XFS_FSB_TO_AGNO(args.mp, bno);
ASSERT(args.agno < args.mp->m_sb.sb_agcount);
if (args.agno >= args.mp->m_sb.sb_agcount)
return EFSCORRUPTED;
args.agbno = XFS_FSB_TO_AGBNO(args.mp, bno);
if (args.agbno >= args.mp->m_sb.sb_agblocks)
return EFSCORRUPTED;
args.pag = xfs_perag_get(args.mp, args.agno);
if ((error = xfs_alloc_fix_freelist(&args, XFS_ALLOC_FLAG_FREEING)))
ASSERT(args.pag);
error = xfs_alloc_fix_freelist(&args, XFS_ALLOC_FLAG_FREEING);
if (error)
goto error0;
#ifdef DEBUG
ASSERT(args.agbp != NULL);
ASSERT((args.agbno + len) <=
be32_to_cpu(XFS_BUF_TO_AGF(args.agbp)->agf_length));
#endif
/* validate the extent size is legal now we have the agf locked */
if (args.agbno + len >
be32_to_cpu(XFS_BUF_TO_AGF(args.agbp)->agf_length)) {
error = EFSCORRUPTED;
goto error0;
}
error = xfs_free_ag_extent(tp, args.agbp, args.agno, args.agbno, len, 0);
error0:
xfs_perag_put(args.pag);

67
fs/xfs/xfs_inode_item.c
View File

@ -197,6 +197,41 @@ xfs_inode_item_size(
return nvecs;
}
/*
* xfs_inode_item_format_extents - convert in-core extents to on-disk form
*
* For either the data or attr fork in extent format, we need to endian convert
* the in-core extent as we place them into the on-disk inode. In this case, we
* need to do this conversion before we write the extents into the log. Because
* we don't have the disk inode to write into here, we allocate a buffer and
* format the extents into it via xfs_iextents_copy(). We free the buffer in
* the unlock routine after the copy for the log has been made.
*
* In the case of the data fork, the in-core and on-disk fork sizes can be
* different due to delayed allocation extents. We only log on-disk extents
* here, so always use the physical fork size to determine the size of the
* buffer we need to allocate.
*/
STATIC void
xfs_inode_item_format_extents(
struct xfs_inode *ip,
struct xfs_log_iovec *vecp,
int whichfork,
int type)
{
xfs_bmbt_rec_t *ext_buffer;
ext_buffer = kmem_alloc(XFS_IFORK_SIZE(ip, whichfork), KM_SLEEP);
if (whichfork == XFS_DATA_FORK)
ip->i_itemp->ili_extents_buf = ext_buffer;
else
ip->i_itemp->ili_aextents_buf = ext_buffer;
vecp->i_addr = ext_buffer;
vecp->i_len = xfs_iextents_copy(ip, ext_buffer, whichfork);
vecp->i_type = type;
}
/*
* This is called to fill in the vector of log iovecs for the
* given inode log item. It fills the first item with an inode
@ -213,7 +248,6 @@ xfs_inode_item_format(
struct xfs_inode *ip = iip->ili_inode;
uint nvecs;
size_t data_bytes;
xfs_bmbt_rec_t *ext_buffer;
xfs_mount_t *mp;
vecp->i_addr = &iip->ili_format;
@ -320,22 +354,8 @@ xfs_inode_item_format(
} else
#endif
{
/*
* There are delayed allocation extents
* in the inode, or we need to convert
* the extents to on disk format.
* Use xfs_iextents_copy()
* to copy only the real extents into
* a separate buffer. We'll free the
* buffer in the unlock routine.
*/
ext_buffer = kmem_alloc(ip->i_df.if_bytes,
KM_SLEEP);
iip->ili_extents_buf = ext_buffer;
vecp->i_addr = ext_buffer;
vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
XFS_DATA_FORK);
vecp->i_type = XLOG_REG_TYPE_IEXT;
xfs_inode_item_format_extents(ip, vecp,
XFS_DATA_FORK, XLOG_REG_TYPE_IEXT);
}
ASSERT(vecp->i_len <= ip->i_df.if_bytes);
iip->ili_format.ilf_dsize = vecp->i_len;
@ -445,19 +465,12 @@ xfs_inode_item_format(
*/
vecp->i_addr = ip->i_afp->if_u1.if_extents;
vecp->i_len = ip->i_afp->if_bytes;
vecp->i_type = XLOG_REG_TYPE_IATTR_EXT;
#else
ASSERT(iip->ili_aextents_buf == NULL);
/*
* Need to endian flip before logging
*/
ext_buffer = kmem_alloc(ip->i_afp->if_bytes,
KM_SLEEP);
iip->ili_aextents_buf = ext_buffer;
vecp->i_addr = ext_buffer;
vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
XFS_ATTR_FORK);
xfs_inode_item_format_extents(ip, vecp,
XFS_ATTR_FORK, XLOG_REG_TYPE_IATTR_EXT);
#endif
vecp->i_type = XLOG_REG_TYPE_IATTR_EXT;
iip->ili_format.ilf_asize = vecp->i_len;
vecp++;
nvecs++;

2
fs/xfs/xfs_itable.c
View File

@ -204,7 +204,6 @@ xfs_bulkstat(
xfs_agi_t *agi; /* agi header data */
xfs_agino_t agino; /* inode # in allocation group */
xfs_agnumber_t agno; /* allocation group number */
xfs_daddr_t bno; /* inode cluster start daddr */
int chunkidx; /* current index into inode chunk */
int clustidx; /* current index into inode cluster */
xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
@ -463,7 +462,6 @@ xfs_bulkstat(
mp->m_sb.sb_inopblog);
}
ino = XFS_AGINO_TO_INO(mp, agno, agino);
bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
/*
* Skip if this inode is free.
*/

38
fs/xfs/xfs_log.c
View File

@ -761,7 +761,7 @@ xfs_log_need_covered(xfs_mount_t *mp)
break;
case XLOG_STATE_COVER_NEED:
case XLOG_STATE_COVER_NEED2:
if (!xfs_trans_ail_tail(log->l_ailp) &&
if (!xfs_ail_min_lsn(log->l_ailp) &&
xlog_iclogs_empty(log)) {
if (log->l_covered_state == XLOG_STATE_COVER_NEED)
log->l_covered_state = XLOG_STATE_COVER_DONE;
@ -801,7 +801,7 @@ xlog_assign_tail_lsn(
xfs_lsn_t tail_lsn;
struct log *log = mp->m_log;
tail_lsn = xfs_trans_ail_tail(mp->m_ail);
tail_lsn = xfs_ail_min_lsn(mp->m_ail);
if (!tail_lsn)
tail_lsn = atomic64_read(&log->l_last_sync_lsn);
@ -1239,7 +1239,7 @@ xlog_grant_push_ail(
* the filesystem is shutting down.
*/
if (!XLOG_FORCED_SHUTDOWN(log))
xfs_trans_ail_push(log->l_ailp, threshold_lsn);
xfs_ail_push(log->l_ailp, threshold_lsn);
}
/*
@ -3407,6 +3407,17 @@ xlog_verify_dest_ptr(
xfs_emerg(log->l_mp, "%s: invalid ptr", __func__);
}
/*
* Check to make sure the grant write head didn't just over lap the tail. If
* the cycles are the same, we can't be overlapping. Otherwise, make sure that
* the cycles differ by exactly one and check the byte count.
*
* This check is run unlocked, so can give false positives. Rather than assert
* on failures, use a warn-once flag and a panic tag to allow the admin to
* determine if they want to panic the machine when such an error occurs. For
* debug kernels this will have the same effect as using an assert but, unlinke
* an assert, it can be turned off at runtime.
*/
STATIC void
xlog_verify_grant_tail(
struct log *log)
@ -3414,17 +3425,22 @@ xlog_verify_grant_tail(
int tail_cycle, tail_blocks;
int cycle, space;
/*
* Check to make sure the grant write head didn't just over lap the
* tail. If the cycles are the same, we can't be overlapping.
* Otherwise, make sure that the cycles differ by exactly one and
* check the byte count.
*/
xlog_crack_grant_head(&log->l_grant_write_head, &cycle, &space);
xlog_crack_atomic_lsn(&log->l_tail_lsn, &tail_cycle, &tail_blocks);
if (tail_cycle != cycle) {
ASSERT(cycle - 1 == tail_cycle);
ASSERT(space <= BBTOB(tail_blocks));
if (cycle - 1 != tail_cycle &&
!(log->l_flags & XLOG_TAIL_WARN)) {
xfs_alert_tag(log->l_mp, XFS_PTAG_LOGRES,
"%s: cycle - 1 != tail_cycle", __func__);
log->l_flags |= XLOG_TAIL_WARN;
}
if (space > BBTOB(tail_blocks) &&
!(log->l_flags & XLOG_TAIL_WARN)) {
xfs_alert_tag(log->l_mp, XFS_PTAG_LOGRES,
"%s: space > BBTOB(tail_blocks)", __func__);
log->l_flags |= XLOG_TAIL_WARN;
}
}
}

1
fs/xfs/xfs_log_priv.h
View File

@ -144,6 +144,7 @@ static inline uint xlog_get_client_id(__be32 i)
#define XLOG_RECOVERY_NEEDED 0x4 /* log was recovered */
#define XLOG_IO_ERROR 0x8 /* log hit an I/O error, and being
shutdown */
#define XLOG_TAIL_WARN 0x10 /* log tail verify warning issued */
#ifdef __KERNEL__
/*

9
fs/xfs/xfs_mount.h
View File

@ -203,12 +203,9 @@ typedef struct xfs_mount {
struct mutex m_icsb_mutex; /* balancer sync lock */
#endif
struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
struct task_struct *m_sync_task; /* generalised sync thread */
xfs_sync_work_t m_sync_work; /* work item for VFS_SYNC */
struct list_head m_sync_list; /* sync thread work item list */
spinlock_t m_sync_lock; /* work item list lock */
int m_sync_seq; /* sync thread generation no. */
wait_queue_head_t m_wait_single_sync_task;
struct delayed_work m_sync_work; /* background sync work */
struct delayed_work m_reclaim_work; /* background inode reclaim */
struct work_struct m_flush_work; /* background inode flush */
__int64_t m_update_flags; /* sb flags we need to update
on the next remount,rw */
struct shrinker m_inode_shrink; /* inode reclaim shrinker */

421
fs/xfs/xfs_trans_ail.c
View File

@ -28,74 +28,138 @@
#include "xfs_trans_priv.h"
#include "xfs_error.h"
STATIC void xfs_ail_splice(struct xfs_ail *, struct list_head *, xfs_lsn_t);
STATIC void xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *);
STATIC xfs_log_item_t * xfs_ail_min(struct xfs_ail *);
STATIC xfs_log_item_t * xfs_ail_next(struct xfs_ail *, xfs_log_item_t *);
struct workqueue_struct *xfs_ail_wq; /* AIL workqueue */
#ifdef DEBUG
STATIC void xfs_ail_check(struct xfs_ail *, xfs_log_item_t *);
#else
/*
* Check that the list is sorted as it should be.
*/
STATIC void
xfs_ail_check(
struct xfs_ail *ailp,
xfs_log_item_t *lip)
{
xfs_log_item_t *prev_lip;
if (list_empty(&ailp->xa_ail))
return;
/*
* Check the next and previous entries are valid.
*/
ASSERT((lip->li_flags & XFS_LI_IN_AIL) != 0);
prev_lip = list_entry(lip->li_ail.prev, xfs_log_item_t, li_ail);
if (&prev_lip->li_ail != &ailp->xa_ail)
ASSERT(XFS_LSN_CMP(prev_lip->li_lsn, lip->li_lsn) <= 0);
prev_lip = list_entry(lip->li_ail.next, xfs_log_item_t, li_ail);
if (&prev_lip->li_ail != &ailp->xa_ail)
ASSERT(XFS_LSN_CMP(prev_lip->li_lsn, lip->li_lsn) >= 0);
#ifdef XFS_TRANS_DEBUG
/*
* Walk the list checking lsn ordering, and that every entry has the
* XFS_LI_IN_AIL flag set. This is really expensive, so only do it
* when specifically debugging the transaction subsystem.
*/
prev_lip = list_entry(&ailp->xa_ail, xfs_log_item_t, li_ail);
list_for_each_entry(lip, &ailp->xa_ail, li_ail) {
if (&prev_lip->li_ail != &ailp->xa_ail)
ASSERT(XFS_LSN_CMP(prev_lip->li_lsn, lip->li_lsn) <= 0);
ASSERT((lip->li_flags & XFS_LI_IN_AIL) != 0);
prev_lip = lip;
}
#endif /* XFS_TRANS_DEBUG */
}
#else /* !DEBUG */
#define xfs_ail_check(a,l)
#endif /* DEBUG */
/*
* Return a pointer to the first item in the AIL. If the AIL is empty, then
* return NULL.
*/
static xfs_log_item_t *
xfs_ail_min(
struct xfs_ail *ailp)
{
if (list_empty(&ailp->xa_ail))
return NULL;
return list_first_entry(&ailp->xa_ail, xfs_log_item_t, li_ail);
}
/*
* Return a pointer to the last item in the AIL. If the AIL is empty, then
* return NULL.
*/
static xfs_log_item_t *
xfs_ail_max(
struct xfs_ail *ailp)
{
if (list_empty(&ailp->xa_ail))
return NULL;
return list_entry(ailp->xa_ail.prev, xfs_log_item_t, li_ail);
}
/*
* This is called by the log manager code to determine the LSN
* of the tail of the log. This is exactly the LSN of the first
* item in the AIL. If the AIL is empty, then this function
* returns 0.
* Return a pointer to the item which follows the given item in the AIL. If
* the given item is the last item in the list, then return NULL.
*/
static xfs_log_item_t *
xfs_ail_next(
struct xfs_ail *ailp,
xfs_log_item_t *lip)
{
if (lip->li_ail.next == &ailp->xa_ail)
return NULL;
return list_first_entry(&lip->li_ail, xfs_log_item_t, li_ail);
}
/*
* This is called by the log manager code to determine the LSN of the tail of
* the log. This is exactly the LSN of the first item in the AIL. If the AIL
* is empty, then this function returns 0.
*
* We need the AIL lock in order to get a coherent read of the
* lsn of the last item in the AIL.
* We need the AIL lock in order to get a coherent read of the lsn of the last
* item in the AIL.
*/
xfs_lsn_t
xfs_trans_ail_tail(
xfs_ail_min_lsn(
struct xfs_ail *ailp)
{
xfs_lsn_t lsn;
xfs_lsn_t lsn = 0;
xfs_log_item_t *lip;
spin_lock(&ailp->xa_lock);
lip = xfs_ail_min(ailp);
if (lip == NULL) {
lsn = (xfs_lsn_t)0;
} else {
if (lip)
lsn = lip->li_lsn;
}
spin_unlock(&ailp->xa_lock);
return lsn;
}
/*
* xfs_trans_push_ail
*
* This routine is called to move the tail of the AIL forward. It does this by
* trying to flush items in the AIL whose lsns are below the given
* threshold_lsn.
*
* the push is run asynchronously in a separate thread, so we return the tail
* of the log right now instead of the tail after the push. This means we will
* either continue right away, or we will sleep waiting on the async thread to
* do its work.
*
* We do this unlocked - we only need to know whether there is anything in the
* AIL at the time we are called. We don't need to access the contents of
* any of the objects, so the lock is not needed.
* Return the maximum lsn held in the AIL, or zero if the AIL is empty.
*/
void
xfs_trans_ail_push(
struct xfs_ail *ailp,
xfs_lsn_t threshold_lsn)
static xfs_lsn_t
xfs_ail_max_lsn(
struct xfs_ail *ailp)
{
xfs_log_item_t *lip;
xfs_lsn_t lsn = 0;
xfs_log_item_t *lip;
lip = xfs_ail_min(ailp);
if (lip && !XFS_FORCED_SHUTDOWN(ailp->xa_mount)) {
if (XFS_LSN_CMP(threshold_lsn, ailp->xa_target) > 0)
xfsaild_wakeup(ailp, threshold_lsn);
}
spin_lock(&ailp->xa_lock);
lip = xfs_ail_max(ailp);
if (lip)
lsn = lip->li_lsn;
spin_unlock(&ailp->xa_lock);
return lsn;
}
/*
@ -236,16 +300,57 @@ out:
}
/*
* xfsaild_push does the work of pushing on the AIL. Returning a timeout of
* zero indicates that the caller should sleep until woken.
* splice the log item list into the AIL at the given LSN.
*/
long
xfsaild_push(
struct xfs_ail *ailp,
xfs_lsn_t *last_lsn)
static void
xfs_ail_splice(
struct xfs_ail *ailp,
struct list_head *list,
xfs_lsn_t lsn)
{
long tout = 0;
xfs_lsn_t last_pushed_lsn = *last_lsn;
xfs_log_item_t *next_lip;
/* If the list is empty, just insert the item. */
if (list_empty(&ailp->xa_ail)) {
list_splice(list, &ailp->xa_ail);
return;
}
list_for_each_entry_reverse(next_lip, &ailp->xa_ail, li_ail) {
if (XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0)
break;
}
ASSERT(&next_lip->li_ail == &ailp->xa_ail ||
XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0);
list_splice_init(list, &next_lip->li_ail);
}
/*
* Delete the given item from the AIL. Return a pointer to the item.
*/
static void
xfs_ail_delete(
struct xfs_ail *ailp,
xfs_log_item_t *lip)
{
xfs_ail_check(ailp, lip);
list_del(&lip->li_ail);
xfs_trans_ail_cursor_clear(ailp, lip);
}
/*
* xfs_ail_worker does the work of pushing on the AIL. It will requeue itself
* to run at a later time if there is more work to do to complete the push.
*/
STATIC void
xfs_ail_worker(
struct work_struct *work)
{
struct xfs_ail *ailp = container_of(to_delayed_work(work),
struct xfs_ail, xa_work);
long tout;
xfs_lsn_t target = ailp->xa_target;
xfs_lsn_t lsn;
xfs_log_item_t *lip;
@ -256,15 +361,15 @@ xfsaild_push(
spin_lock(&ailp->xa_lock);
xfs_trans_ail_cursor_init(ailp, cur);
lip = xfs_trans_ail_cursor_first(ailp, cur, *last_lsn);
lip = xfs_trans_ail_cursor_first(ailp, cur, ailp->xa_last_pushed_lsn);
if (!lip || XFS_FORCED_SHUTDOWN(mp)) {
/*
* AIL is empty or our push has reached the end.
*/
xfs_trans_ail_cursor_done(ailp, cur);
spin_unlock(&ailp->xa_lock);
*last_lsn = 0;
return tout;
ailp->xa_last_pushed_lsn = 0;
return;
}
XFS_STATS_INC(xs_push_ail);
@ -301,13 +406,13 @@ xfsaild_push(
case XFS_ITEM_SUCCESS:
XFS_STATS_INC(xs_push_ail_success);
IOP_PUSH(lip);
last_pushed_lsn = lsn;
ailp->xa_last_pushed_lsn = lsn;
break;
case XFS_ITEM_PUSHBUF:
XFS_STATS_INC(xs_push_ail_pushbuf);
IOP_PUSHBUF(lip);
last_pushed_lsn = lsn;
ailp->xa_last_pushed_lsn = lsn;
push_xfsbufd = 1;
break;
@ -319,7 +424,7 @@ xfsaild_push(
case XFS_ITEM_LOCKED:
XFS_STATS_INC(xs_push_ail_locked);
last_pushed_lsn = lsn;
ailp->xa_last_pushed_lsn = lsn;
stuck++;
break;
@ -374,9 +479,23 @@ xfsaild_push(
wake_up_process(mp->m_ddev_targp->bt_task);
}
/* assume we have more work to do in a short while */
tout = 10;
if (!count) {
/* We're past our target or empty, so idle */
last_pushed_lsn = 0;
ailp->xa_last_pushed_lsn = 0;
/*
* Check for an updated push target before clearing the
* XFS_AIL_PUSHING_BIT. If the target changed, we've got more
* work to do. Wait a bit longer before starting that work.
*/
smp_rmb();
if (ailp->xa_target == target) {
clear_bit(XFS_AIL_PUSHING_BIT, &ailp->xa_flags);
return;
}
tout = 50;
} else if (XFS_LSN_CMP(lsn, target) >= 0) {
/*
* We reached the target so wait a bit longer for I/O to
@ -384,7 +503,7 @@ xfsaild_push(
* start the next scan from the start of the AIL.
*/
tout = 50;
last_pushed_lsn = 0;
ailp->xa_last_pushed_lsn = 0;
} else if ((stuck * 100) / count > 90) {
/*
* Either there is a lot of contention on the AIL or we
@ -396,14 +515,61 @@ xfsaild_push(
* continuing from where we were.
*/
tout = 20;
} else {
/* more to do, but wait a short while before continuing */
tout = 10;
}
*last_lsn = last_pushed_lsn;
return tout;
/* There is more to do, requeue us. */
queue_delayed_work(xfs_syncd_wq, &ailp->xa_work,
msecs_to_jiffies(tout));
}
/*
* This routine is called to move the tail of the AIL forward. It does this by
* trying to flush items in the AIL whose lsns are below the given
* threshold_lsn.
*
* The push is run asynchronously in a workqueue, which means the caller needs
* to handle waiting on the async flush for space to become available.
* We don't want to interrupt any push that is in progress, hence we only queue
* work if we set the pushing bit approriately.
*
* We do this unlocked - we only need to know whether there is anything in the
* AIL at the time we are called. We don't need to access the contents of
* any of the objects, so the lock is not needed.
*/
void
xfs_ail_push(
struct xfs_ail *ailp,
xfs_lsn_t threshold_lsn)
{
xfs_log_item_t *lip;
lip = xfs_ail_min(ailp);
if (!lip || XFS_FORCED_SHUTDOWN(ailp->xa_mount) ||
XFS_LSN_CMP(threshold_lsn, ailp->xa_target) <= 0)
return;
/*
* Ensure that the new target is noticed in push code before it clears
* the XFS_AIL_PUSHING_BIT.
*/
smp_wmb();
ailp->xa_target = threshold_lsn;
if (!test_and_set_bit(XFS_AIL_PUSHING_BIT, &ailp->xa_flags))
queue_delayed_work(xfs_syncd_wq, &ailp->xa_work, 0);
}
/*
* Push out all items in the AIL immediately
*/
void
xfs_ail_push_all(
struct xfs_ail *ailp)
{
xfs_lsn_t threshold_lsn = xfs_ail_max_lsn(ailp);
if (threshold_lsn)
xfs_ail_push(ailp, threshold_lsn);
}
/*
* This is to be called when an item is unlocked that may have
@ -615,7 +781,6 @@ xfs_trans_ail_init(
xfs_mount_t *mp)
{
struct xfs_ail *ailp;
int error;
ailp = kmem_zalloc(sizeof(struct xfs_ail), KM_MAYFAIL);
if (!ailp)
@ -624,15 +789,9 @@ xfs_trans_ail_init(
ailp->xa_mount = mp;
INIT_LIST_HEAD(&ailp->xa_ail);
spin_lock_init(&ailp->xa_lock);
error = xfsaild_start(ailp);
if (error)
goto out_free_ailp;
INIT_DELAYED_WORK(&ailp->xa_work, xfs_ail_worker);
mp->m_ail = ailp;
return 0;
out_free_ailp:
kmem_free(ailp);
return error;
}
void
@ -641,124 +800,6 @@ xfs_trans_ail_destroy(
{
struct xfs_ail *ailp = mp->m_ail;
xfsaild_stop(ailp);
cancel_delayed_work_sync(&ailp->xa_work);
kmem_free(ailp);
}
/*
* splice the log item list into the AIL at the given LSN.
*/
STATIC void
xfs_ail_splice(
struct xfs_ail *ailp,
struct list_head *list,
xfs_lsn_t lsn)
{
xfs_log_item_t *next_lip;
/*
* If the list is empty, just insert the item.
*/
if (list_empty(&ailp->xa_ail)) {
list_splice(list, &ailp->xa_ail);
return;
}
list_for_each_entry_reverse(next_lip, &ailp->xa_ail, li_ail) {
if (XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0)
break;
}
ASSERT((&next_lip->li_ail == &ailp->xa_ail) ||
(XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0));
list_splice_init(list, &next_lip->li_ail);
return;
}
/*
* Delete the given item from the AIL. Return a pointer to the item.
*/
STATIC void
xfs_ail_delete(
struct xfs_ail *ailp,
xfs_log_item_t *lip)
{
xfs_ail_check(ailp, lip);
list_del(&lip->li_ail);
xfs_trans_ail_cursor_clear(ailp, lip);
}
/*
* Return a pointer to the first item in the AIL.
* If the AIL is empty, then return NULL.
*/
STATIC xfs_log_item_t *
xfs_ail_min(
struct xfs_ail *ailp)
{
if (list_empty(&ailp->xa_ail))
return NULL;
return list_first_entry(&ailp->xa_ail, xfs_log_item_t, li_ail);
}
/*
* Return a pointer to the item which follows
* the given item in the AIL. If the given item
* is the last item in the list, then return NULL.
*/
STATIC xfs_log_item_t *
xfs_ail_next(
struct xfs_ail *ailp,
xfs_log_item_t *lip)
{
if (lip->li_ail.next == &ailp->xa_ail)
return NULL;
return list_first_entry(&lip->li_ail, xfs_log_item_t, li_ail);
}
#ifdef DEBUG
/*
* Check that the list is sorted as it should be.
*/
STATIC void
xfs_ail_check(
struct xfs_ail *ailp,
xfs_log_item_t *lip)
{
xfs_log_item_t *prev_lip;
if (list_empty(&ailp->xa_ail))
return;
/*
* Check the next and previous entries are valid.
*/
ASSERT((lip->li_flags & XFS_LI_IN_AIL) != 0);
prev_lip = list_entry(lip->li_ail.prev, xfs_log_item_t, li_ail);
if (&prev_lip->li_ail != &ailp->xa_ail)
ASSERT(XFS_LSN_CMP(prev_lip->li_lsn, lip->li_lsn) <= 0);
prev_lip = list_entry(lip->li_ail.next, xfs_log_item_t, li_ail);
if (&prev_lip->li_ail != &ailp->xa_ail)
ASSERT(XFS_LSN_CMP(prev_lip->li_lsn, lip->li_lsn) >= 0);
#ifdef XFS_TRANS_DEBUG
/*
* Walk the list checking lsn ordering, and that every entry has the
* XFS_LI_IN_AIL flag set. This is really expensive, so only do it
* when specifically debugging the transaction subsystem.
*/
prev_lip = list_entry(&ailp->xa_ail, xfs_log_item_t, li_ail);
list_for_each_entry(lip, &ailp->xa_ail, li_ail) {
if (&prev_lip->li_ail != &ailp->xa_ail)
ASSERT(XFS_LSN_CMP(prev_lip->li_lsn, lip->li_lsn) <= 0);
ASSERT((lip->li_flags & XFS_LI_IN_AIL) != 0);
prev_lip = lip;
}
#endif /* XFS_TRANS_DEBUG */
}
#endif /* DEBUG */

22
fs/xfs/xfs_trans_priv.h
View File

@ -65,16 +65,22 @@ struct xfs_ail_cursor {
struct xfs_ail {
struct xfs_mount *xa_mount;
struct list_head xa_ail;
uint xa_gen;
struct task_struct *xa_task;
xfs_lsn_t xa_target;
struct xfs_ail_cursor xa_cursors;
spinlock_t xa_lock;
struct delayed_work xa_work;
xfs_lsn_t xa_last_pushed_lsn;
unsigned long xa_flags;
};
#define XFS_AIL_PUSHING_BIT 0
/*
* From xfs_trans_ail.c
*/
extern struct workqueue_struct *xfs_ail_wq; /* AIL workqueue */
void xfs_trans_ail_update_bulk(struct xfs_ail *ailp,
struct xfs_log_item **log_items, int nr_items,
xfs_lsn_t lsn) __releases(ailp->xa_lock);
@ -98,12 +104,13 @@ xfs_trans_ail_delete(
xfs_trans_ail_delete_bulk(ailp, &lip, 1);
}
void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t);
void xfs_ail_push(struct xfs_ail *, xfs_lsn_t);
void xfs_ail_push_all(struct xfs_ail *);
xfs_lsn_t xfs_ail_min_lsn(struct xfs_ail *ailp);
void xfs_trans_unlocked_item(struct xfs_ail *,
xfs_log_item_t *);
xfs_lsn_t xfs_trans_ail_tail(struct xfs_ail *ailp);
struct xfs_log_item *xfs_trans_ail_cursor_first(struct xfs_ail *ailp,
struct xfs_ail_cursor *cur,
xfs_lsn_t lsn);
@ -112,11 +119,6 @@ struct xfs_log_item *xfs_trans_ail_cursor_next(struct xfs_ail *ailp,
void xfs_trans_ail_cursor_done(struct xfs_ail *ailp,
struct xfs_ail_cursor *cur);
long xfsaild_push(struct xfs_ail *, xfs_lsn_t *);
void xfsaild_wakeup(struct xfs_ail *, xfs_lsn_t);
int xfsaild_start(struct xfs_ail *);
void xfsaild_stop(struct xfs_ail *);
#if BITS_PER_LONG != 64
static inline void
xfs_trans_ail_copy_lsn(