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0637c6f413
kernel_optimize_test/fs
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Theodore Ts'o 0637c6f413 ext4: Patch up how we claim metadata blocks for quota purposes 
As reported in Kernel Bugzilla #14936, commit d21cd8f triggered a BUG
in the function ext4_da_update_reserve_space() found in
fs/ext4/inode.c.  The root cause of this BUG() was caused by the fact
that ext4_calc_metadata_amount() can severely over-estimate how many
metadata blocks will be needed, especially when using direct
block-mapped files.

In addition, it can also badly *under* estimate how much space is
needed, since ext4_calc_metadata_amount() assumes that the blocks are
contiguous, and this is not always true.  If the application is
writing blocks to a sparse file, the number of metadata blocks
necessary can be severly underestimated by the functions
ext4_da_reserve_space(), ext4_da_update_reserve_space() and
ext4_da_release_space().  This was the cause of the dq_claim_space
reports found on kerneloops.org.

Unfortunately, doing this right means that we need to massively
over-estimate the amount of free space needed.  So in some cases we
may need to force the inode to be written to disk asynchronously in
to avoid spurious quota failures.

http://bugzilla.kernel.org/show_bug.cgi?id=14936

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-12-30 14:20:45 -05:00
..
9p
adfs
affs
afs afs: remove manual O_SYNC handling 2009-12-10 15:02:50 +01:00
autofs
autofs4 autofs4: always use lookup for lookup 2009-12-16 07:19:58 -08:00
befs
bfs
btrfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable 2009-12-17 16:01:03 -08:00
cachefiles Untangling ima mess, part 2: deal with counters 2009-12-16 12:16:47 -05:00
cifs Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linux 2009-12-16 10:43:34 -08:00
coda
configfs
cramfs
debugfs debugfs: fix create mutex racy fops and private data 2009-12-11 11:24:53 -08:00
devpts devpts_get_tty() should validate inode 2009-12-11 15:18:05 -08:00
dlm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm 2009-12-10 09:33:59 -08:00
ecryptfs fsstack/ecryptfs: remove unused get_nlinks param to fsstack_copy_attr_all 2009-12-17 10:57:30 -05:00
efs
exofs exofs: Multi-device mirror support 2009-12-10 09:59:23 +02:00
exportfs
ext2 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-12-16 12:04:02 -08:00
ext3 ext3: Replace lock/unlock_super() with an explicit lock for resizing 2009-12-23 13:44:12 +01:00
ext4 ext4: Patch up how we claim metadata blocks for quota purposes 2009-12-30 14:20:45 -05:00
fat Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6 2009-12-16 10:29:26 -08:00
freevxfs
fscache FS-Cache: Avoid maybe-used-uninitialised warning on variable 2009-12-16 07:20:13 -08:00
fuse
gfs2 Revert "task_struct: make journal_info conditional" 2009-12-17 13:23:24 -08:00
hfs hfs: fix a potential buffer overflow 2009-12-15 08:53:10 -08:00
hfsplus
hostfs
hpfs hpfs: use bitmap_weight() 2009-12-16 07:20:06 -08:00
hppfs
hugetlbfs Untangling ima mess, part 1: alloc_file() 2009-12-16 12:16:47 -05:00
isofs Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linux 2009-12-16 10:43:34 -08:00
jbd jbd: jbd-debug and jbd2-debug should be writable 2009-12-23 13:44:13 +01:00
jbd2 jbd2: don't use __GFP_NOFAIL in journal_init_common() 2009-12-23 08:05:15 -05:00
jffs2 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-12-16 12:04:02 -08:00
jfs jfs: Fix 32bit build warning 2009-12-22 12:27:35 -05:00
lockd Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linux 2009-12-16 10:43:34 -08:00
minix
ncpfs tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
nfs Revert "fix mismerge with Trond's stuff (create_mnt_ns() export is gone now)" 2009-12-17 12:51:05 -08:00
nfs_common
nfsd nfsd: fix "insecure" export option 2009-12-20 20:19:51 -08:00
nilfs2 Revert "task_struct: make journal_info conditional" 2009-12-17 13:23:24 -08:00
nls
notify switch alloc_file() to passing struct path 2009-12-16 12:16:42 -05:00
ntfs kill I_LOCK 2009-12-17 11:03:25 -05:00
ocfs2 Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 2009-12-24 12:59:11 -08:00
omfs tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
openpromfs
partitions
proc Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-12-19 09:47:49 -08:00
qnx4 qnx4: use hweight8 2009-12-16 07:20:18 -08:00
quota quota: Improve checking of quota file header 2009-12-23 13:44:13 +01:00
ramfs nommu: ramfs: remove unused local var 2009-12-17 15:45:31 -08:00
reiserfs reiserfs: truncate blocks not used by a write 2009-12-17 15:45:30 -08:00
romfs
smbfs
squashfs
sysfs Driver core: bin_attribute parameters can often be const* 2009-12-23 11:23:43 -08:00
sysv
ubifs kill I_LOCK 2009-12-17 11:03:25 -05:00
udf udf: Avoid IO in udf_clear_inode 2009-12-14 21:40:04 +01:00
ufs ufs: NFS support 2009-12-16 07:20:06 -08:00
xfs kill I_LOCK 2009-12-17 11:03:25 -05:00
aio.c aio: remove unused field 2009-12-16 07:20:13 -08:00
anon_inodes.c Sanitize f_flags helpers 2009-12-22 12:27:34 -05:00
attr.c
bad_inode.c
binfmt_aout.c mm: introduce coredump parameter structure 2009-12-17 15:45:31 -08:00
binfmt_elf_fdpic.c mm: introduce coredump parameter structure 2009-12-17 15:45:31 -08:00
binfmt_elf.c mm: introduce coredump parameter structure 2009-12-17 15:45:31 -08:00
binfmt_em86.c
binfmt_flat.c mm: introduce coredump parameter structure 2009-12-17 15:45:31 -08:00
binfmt_misc.c
binfmt_script.c
binfmt_som.c mm: introduce coredump parameter structure 2009-12-17 15:45:31 -08:00
bio-integrity.c
bio.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-12-09 19:43:33 -08:00
block_dev.c
buffer.c
char_dev.c
compat_binfmt_elf.c
compat_ioctl.c fs/compat_ioctl.c: fix build error when !BLOCK 2009-12-22 12:27:33 -05:00
compat.c compat.c: Remove dependence on nfsd private headers 2009-12-14 18:12:10 -05:00
dcache.c libfs: move EXPORT_SYMBOL for d_alloc_name 2009-12-16 12:16:48 -05:00
dcookies.c
direct-io.c dio: fix use-after-free 2009-12-17 04:52:13 -05:00
drop_caches.c
eventfd.c anonfd: Allow making anon files read-only 2009-12-22 12:27:34 -05:00
eventpoll.c anonfd: Allow making anon files read-only 2009-12-22 12:27:34 -05:00
exec.c mm: introduce coredump parameter structure 2009-12-17 15:45:31 -08:00
fcntl.c
fifo.c
file_table.c alloc_file(): simplify handling of mnt_clone_write() errors 2009-12-22 12:27:33 -05:00
file.c
filesystems.c
fs_struct.c
fs-writeback.c fs-writeback: Add helper function to start writeback if idle 2009-12-23 07:57:07 -05:00
generic_acl.c make generic_acl slightly more generic 2009-12-16 12:16:49 -05:00
inode.c kill I_LOCK 2009-12-17 11:03:25 -05:00
internal.h Fix f_flags/f_mode in case of lookup_instantiate_filp() from open(pathname, 3) 2009-12-22 12:27:34 -05:00
ioctl.c
ioprio.c
Kconfig Revert "task_struct: make journal_info conditional" 2009-12-17 13:23:24 -08:00
Kconfig.binfmt
libfs.c libfs: move EXPORT_SYMBOL for d_alloc_name 2009-12-16 12:16:48 -05:00
locks.c
Makefile
mbcache.c
mpage.c
namei.c Sanitize f_flags helpers 2009-12-22 12:27:34 -05:00
namespace.c Revert "fix mismerge with Trond's stuff (create_mnt_ns() export is gone now)" 2009-12-17 12:51:05 -08:00
nfsctl.c vfs: nfsctl.c un-used nfsd #includes 2009-12-14 18:12:11 -05:00
no-block.c
open.c Sanitize f_flags helpers 2009-12-22 12:27:34 -05:00
pipe.c fs: no games with DCACHE_UNHASHED 2009-12-17 10:51:40 -05:00
pnode.c
pnode.h
posix_acl.c
read_write.c
read_write.h
readdir.c
select.c
seq_file.c
signalfd.c anonfd: Allow making anon files read-only 2009-12-22 12:27:34 -05:00
splice.c
stack.c VFS/fsstack: handle 32-bit smp + preempt + large files in fsstack_copy_inode_size 2009-12-17 10:58:17 -05:00
stat.c Add unlocked version of inode_add_bytes() function 2009-12-23 13:33:54 +01:00
super.c vfs: get_sb_single() - do not pass options twice 2009-12-23 11:23:43 -08:00
sync.c fold do_sync_file_range into sys_sync_file_range 2009-12-17 11:03:25 -05:00
timerfd.c anonfd: Allow making anon files read-only 2009-12-22 12:27:34 -05:00
utimes.c
xattr_acl.c
xattr.c sanitize xattr handler prototypes 2009-12-16 12:16:49 -05:00