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Chuck Lever 28c494c5c8 NFS: Prevent nfs_getattr() hang during heavy write workloads 
POSIX requires that ctime and mtime, as reported by the stat(2) call,
reflect the activity of the most recent write(2).  To that end, nfs_getattr()
flushes pending dirty writes to a file before doing a GETATTR to allow the
NFS server to set the file's size, ctime, and mtime properly.

However, nfs_getattr() can be starved when a constant stream of application
writes to a file prevents nfs_wb_nocommit() from completing.  This usually
results in hangs of programs doing a stat against an NFS file that is being
written.  "ls -l" is a common victim of this behavior.

To prevent starvation, hold the file's i_mutex in nfs_getattr() to
freeze applications writes temporarily so the client can more quickly obtain
clean values for a file's size, mtime, and ctime.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30 02:05:45 -05:00
..
9p
9p: use copy of the options value instead of original
2007-11-06 08:02:53 -06:00
adfs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
affs
fs: mark nibblemap const
2007-10-17 08:42:47 -07:00
afs
vfs: Add 64 bit i_version support
2008-01-28 23:58:27 -05:00
autofs
Use task_pid_nr() instead of pid_nr(task_pid())
2007-10-19 11:53:43 -07:00
autofs4
pid namespaces: round up the API
2007-10-19 11:53:37 -07:00
befs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
bfs
regression: bfs endianness bug
2007-12-05 09:25:20 -08:00
cifs
[CIFS] DFS build fixes
2008-01-25 10:12:41 +00:00
coda
coda: convert struct class_device to struct device
2008-01-24 20:40:05 -08:00
configfs
configfs: file.c fix possible recursive locking
2008-01-25 15:05:47 -08:00
cramfs
fs/cramfs/inode.c: replace hardcoded value with preprocessor constant
2007-10-18 14:37:29 -07:00
debugfs
Kobject: convert fs/* from kobject_unregister() to kobject_put()
2008-01-24 20:40:40 -08:00
devpts
…
dlm
Kobject: convert fs/* from kobject_unregister() to kobject_put()
2008-01-24 20:40:40 -08:00
ecryptfs
[NETNS]: Consolidate kernel netlink socket destruction.
2008-01-28 15:08:07 -08:00
efs
exportfs: make struct export_operations const
2007-10-22 08:13:21 -07:00
exportfs
exportfs: update documentation
2007-10-22 08:13:21 -07:00
ext2
ext2: Fix the max file size for ext2 file system.
2008-01-28 23:58:26 -05:00
ext3
ext3: Fix the max file size for ext3 file system.
2008-01-28 23:58:26 -05:00
ext4
ext4: Use the ext4_ext_actual_len() helper function
2008-01-28 23:58:27 -05:00
fat
fat: optimize fat_count_free_clusters()
2008-01-08 16:10:35 -08:00
freevxfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
fuse
Kobject: convert fs/* from kobject_unregister() to kobject_put()
2008-01-24 20:40:40 -08:00
gfs2
Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw
2008-01-25 08:39:18 -08:00
hfs
hfs: fix coverity-found null deref
2008-01-17 15:38:58 -08:00
hfsplus
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
hostfs
uml: fix hostfs style
2007-10-16 09:43:07 -07:00
hpfs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
hppfs
…
hugetlbfs
hugetlb: allow bulk updating in hugetlb_*_quota()
2007-11-14 18:45:40 -08:00
isofs
exportfs: make struct export_operations const
2007-10-22 08:13:21 -07:00
jbd
jbd: do not try lock_acquire after handle made invalid
2008-01-17 15:38:59 -08:00
jbd2
jbd2: sparse pointer use of zero as null
2008-01-28 23:58:27 -05:00
jffs2
Freezer: Fix JFFS2 garbage collector freezing issue (rev. 2)
2007-12-04 01:35:41 -05:00
jfs
mount options: fix jfs
2008-01-24 16:13:21 -06:00
lockd
NFS/SUNRPC: use transport protocol naming
2007-10-09 17:17:53 -04:00
minix
limit minixfs printks on corrupted dir i_size
2007-10-17 08:42:53 -07:00
msdos
…
ncpfs
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
nfs
NFS: Prevent nfs_getattr() hang during heavy write workloads
2008-01-30 02:05:45 -05:00
nfs_common
…
nfsd
knfsd: Allow NFSv2/3 WRITE calls to succeed when krb5i etc is used.
2008-01-13 09:57:57 -08:00
nls
sparse pointer use of zero as null
2007-10-18 14:37:31 -07:00
ntfs
NTFS: Fix read regression.
2007-11-03 12:27:21 -07:00
ocfs2
ocfs2: Fix userspace ABI breakage in sysfs
2008-01-28 19:10:23 -08:00
openpromfs
[SPARC]: Constify function pointer tables.
2008-01-22 18:29:20 -08:00
partitions
Kobject: convert fs/* from kobject_unregister() to kobject_put()
2008-01-24 20:40:40 -08:00
proc
[ATM]: Oops reading net/atm/arp
2008-01-28 15:01:36 -08:00
qnx4
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
ramfs
Remove valueless definition of hard-selected RAMFS option
2007-10-17 08:42:56 -07:00
reiserfs
proc: fix proc_dir_entry refcounting
2007-12-05 09:21:20 -08:00
romfs
fs/romfs/inode.c: trivial improvements
2007-10-17 08:42:47 -07:00
smbfs
FS: Remove dead code
2008-01-28 23:14:37 +01:00
sysfs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
2008-01-25 17:19:08 -08:00
sysv
Slab API: remove useless ctor parameter and reorder parameters
2007-10-17 08:42:45 -07:00
udf
fs/udf/balloc.c: mark a variable as uninitialized_var()
2007-10-17 08:43:00 -07:00
ufs
ufs: fix nexstep dir block size
2007-12-05 09:21:18 -08:00
vfat
…
xfs
[XFS] fix unaligned access in readdir
2008-01-11 18:05:04 +11:00
aio.c
aio: only account I/O wait time in read_events if there are active requests
2007-12-05 09:21:18 -08:00
anon_inodes.c
anon-inodes use open coded atomic_inc for the shared inode
2007-10-17 08:43:00 -07:00
attr.c
VFS: make notify_change pass ATTR_KILL_S*ID to setattr operations
2007-10-18 14:37:22 -07:00
bad_inode.c
sendfile: remove bad_sendfile() from bad_file_ops
2007-07-10 08:04:15 +02:00
binfmt_aout.c
mm: fix exit_mmap BUG() on a.out binary exit
2007-12-20 07:49:53 -08:00
binfmt_elf_fdpic.c
pid namespaces: changes to show virtual ids to user
2007-10-19 11:53:40 -07:00
binfmt_elf.c
core dump: real_parent ppid
2008-01-07 14:55:37 -08:00
binfmt_em86.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
binfmt_flat.c
binfmt_flat: warning fixes
2007-10-17 08:42:54 -07:00
binfmt_misc.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
binfmt_script.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
binfmt_som.c
core_pattern: ignore RLIMIT_CORE if core_pattern is a pipe
2007-10-17 08:42:50 -07:00
bio.c
__bio_clone: don't calculate hw/phys segment counts
2008-01-28 10:04:46 +01:00
block_dev.c
Driver core: convert block from raw kobjects to core devices
2008-01-24 20:40:36 -08:00
buffer.c
Add buffer head related helper functions
2008-01-28 23:58:26 -05:00
char_dev.c
Kobject: rename kobject_init_ng() to kobject_init()
2008-01-24 20:40:38 -08:00
compat_ioctl.c
remove __attribute_used__
2008-01-28 23:21:18 +01:00
compat.c
security: call security_file_permission from rw_verify_area
2008-01-25 11:29:52 +11:00
dcache.c
dcache: don't expose uninitialized memory in /proc/<pid>/fd/<fd>
2007-10-22 08:13:18 -07:00
dcookies.c
Remove fs.h from mm.h
2007-07-29 17:09:29 -07:00
direct-io.c
remove ZERO_PAGE
2007-10-16 09:42:53 -07:00
dnotify.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
dquot.c
Don't send quota messages repeatedly when hardlimit reached
2007-12-23 12:54:36 -08:00
drop_caches.c
invalidate_mapping_pages(): add cond_resched
2007-07-16 09:05:36 -07:00
eventfd.c
…
eventpoll.c
fs/eventpoll.c: use list_for_each_entry() instead of list_for_each()
2007-10-19 11:53:38 -07:00
exec.c
vfs: coredumping fix
2007-11-28 10:58:01 -08:00
fcntl.c
pid namespaces: changes to show virtual ids to user
2007-10-19 11:53:40 -07:00
fifo.c
…
file_table.c
fs/file_table.c: use list_for_each_entry() instead of list_for_each()
2007-10-19 11:53:38 -07:00
file.c
…
filesystems.c
…
fs-writeback.c
Revert "writeback: introduce writeback_control.more_io to indicate more io"
2008-01-14 21:21:29 -08:00
generic_acl.c
Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check
2007-07-17 12:00:03 -07:00
inode.c
ext4: Add inode version support in ext4
2008-01-28 23:58:27 -05:00
inotify_user.c
change inotifyfs magic as the same magic is used for futexfs
2007-10-17 08:43:00 -07:00
inotify.c
[PATCH] new helper - inotify_evict_watch()
2007-10-21 02:37:38 -04:00
internal.h
…
ioctl.c
drop obsolete sys_ioctl export
2007-07-16 09:05:48 -07:00
ioprio.c
cfq-iosched: relax IOPRIO_CLASS_IDLE restrictions
2008-01-28 11:38:15 +01:00
Kconfig
ext4: Add the journal checksum feature
2008-01-28 23:58:27 -05:00
Kconfig.binfmt
…
libfs.c
exportfs: add new methods
2007-10-22 08:13:19 -07:00
locks.c
locks: fix possible infinite loop in posix deadlock detection
2007-10-30 09:04:18 -07:00
Makefile
Remove valueless definition of hard-selected RAMFS option
2007-10-17 08:42:56 -07:00
mbcache.c
fs: Fix to correct the mbcache entries counter
2007-10-25 15:18:29 -07:00
mpage.c
mm: buffered write cleanup
2007-10-16 09:42:54 -07:00
namei.c
Use access mode instead of open flags to determine needed permissions
2008-01-12 14:47:58 -08:00
namespace.c
kobject: convert main fs kobject to use kobject_create
2008-01-24 20:40:13 -08:00
nfsctl.c
nfsctl: use vfs_path_lookup
2007-07-19 10:04:45 -07:00
no-block.c
…
open.c
mark sys_open/sys_read exports unused
2007-11-14 18:45:42 -08:00
pipe.c
sched: affine sync wakeups
2007-10-15 17:00:19 +02:00
pnode.c
…
pnode.h
[PATCH] new helpers - collect_mounts() and release_collected_mounts()
2007-10-21 02:37:25 -04:00
posix_acl.c
…
quota_v1.c
…
quota_v2.c
…
quota.c
[IA64] Fix build failure in fs/quota.c
2007-07-27 15:40:13 -07:00
read_write.c
ext4: export iov_shorten from kernel for ext4's use
2008-01-28 23:58:27 -05:00
read_write.h
…
readdir.c
…
select.c
fs/select, remove unused macros
2007-10-19 11:53:41 -07:00
seq_file.c
[FS] seq_file: Introduce the seq_open_private()
2007-10-10 16:55:33 -07:00
signalfd.c
rename signalfd_siginfo fields
2007-10-17 08:43:01 -07:00
splice.c
splice: fix problem with atime not being updated
2008-01-29 21:55:20 +01:00
stack.c
…
stat.c
…
super.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
sync.c
…
timerfd.c
make timerfd return a u64 and fix the __put_user
2007-07-26 11:35:17 -07:00
utimes.c
VFS: check nanoseconds in utimensat
2007-10-17 08:42:52 -07:00
xattr_acl.c
…
xattr.c
[PATCH] pass dentry to audit_inode()/audit_inode_child()
2007-10-21 02:37:18 -04:00