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xfs: share code for grant head waiting 

Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Christoph Hellwig 2012-02-20 02:31:28 +00:00 committed by Ben Myers
parent a79bf2d75b
commit 23ee3df349
2 changed files with 18 additions and 47 deletions
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63
fs/xfs/xfs_log.c
View File

@ -221,12 +221,13 @@ xlog_writeq_wake(
}
STATIC int
xlog_reserveq_wait(
xlog_grant_head_wait(
struct log *log,
struct xlog_grant_head *head,
struct xlog_ticket *tic,
int need_bytes)
{
list_add_tail(&tic->t_queue, &log->l_reserve_head.waiters);
list_add_tail(&tic->t_queue, &head->waiters);
do {
if (XLOG_FORCED_SHUTDOWN(log))
@ -234,7 +235,7 @@ xlog_reserveq_wait(
xlog_grant_push_ail(log, need_bytes);
__set_current_state(TASK_UNINTERRUPTIBLE);
spin_unlock(&log->l_reserve_head.lock);
spin_unlock(&head->lock);
XFS_STATS_INC(xs_sleep_logspace);
@ -242,44 +243,10 @@ xlog_reserveq_wait(
schedule();
trace_xfs_log_grant_wake(log, tic);
spin_lock(&log->l_reserve_head.lock);
spin_lock(&head->lock);
if (XLOG_FORCED_SHUTDOWN(log))
goto shutdown;
} while (xlog_space_left(log, &log->l_reserve_head.grant) < need_bytes);
list_del_init(&tic->t_queue);
return 0;
shutdown:
list_del_init(&tic->t_queue);
return XFS_ERROR(EIO);
}
STATIC int
xlog_writeq_wait(
struct log *log,
struct xlog_ticket *tic,
int need_bytes)
{
list_add_tail(&tic->t_queue, &log->l_write_head.waiters);
do {
if (XLOG_FORCED_SHUTDOWN(log))
goto shutdown;
xlog_grant_push_ail(log, need_bytes);
__set_current_state(TASK_UNINTERRUPTIBLE);
spin_unlock(&log->l_write_head.lock);
XFS_STATS_INC(xs_sleep_logspace);
trace_xfs_log_regrant_write_sleep(log, tic);
schedule();
trace_xfs_log_regrant_write_wake(log, tic);
spin_lock(&log->l_write_head.lock);
if (XLOG_FORCED_SHUTDOWN(log))
goto shutdown;
} while (xlog_space_left(log, &log->l_write_head.grant) < need_bytes);
} while (xlog_space_left(log, &head->grant) < need_bytes);
list_del_init(&tic->t_queue);
return 0;
@ -2596,12 +2563,15 @@ xlog_grant_log_space(
if (!list_empty_careful(&log->l_reserve_head.waiters)) {
spin_lock(&log->l_reserve_head.lock);
if (!xlog_reserveq_wake(log, &free_bytes) ||
free_bytes < need_bytes)
error = xlog_reserveq_wait(log, tic, need_bytes);
free_bytes < need_bytes) {
error = xlog_grant_head_wait(log, &log->l_reserve_head,
tic, need_bytes);
}
spin_unlock(&log->l_reserve_head.lock);
} else if (free_bytes < need_bytes) {
spin_lock(&log->l_reserve_head.lock);
error = xlog_reserveq_wait(log, tic, need_bytes);
error = xlog_grant_head_wait(log, &log->l_reserve_head, tic,
need_bytes);
spin_unlock(&log->l_reserve_head.lock);
}
if (error)
@ -2649,12 +2619,15 @@ xlog_regrant_write_log_space(
if (!list_empty_careful(&log->l_write_head.waiters)) {
spin_lock(&log->l_write_head.lock);
if (!xlog_writeq_wake(log, &free_bytes) ||
free_bytes < need_bytes)
error = xlog_writeq_wait(log, tic, need_bytes);
free_bytes < need_bytes) {
error = xlog_grant_head_wait(log, &log->l_write_head,
tic, need_bytes);
}
spin_unlock(&log->l_write_head.lock);
} else if (free_bytes < need_bytes) {
spin_lock(&log->l_write_head.lock);
error = xlog_writeq_wait(log, tic, need_bytes);
error = xlog_grant_head_wait(log, &log->l_write_head, tic,
need_bytes);
spin_unlock(&log->l_write_head.lock);
}

2
fs/xfs/xfs_trace.h
View File

@ -837,8 +837,6 @@ DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake_up);
DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_enter);
DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_exit);
DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_error);
DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_sleep);
DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake);
DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake_up);
DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_enter);
DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_exit);