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Dave Chinner 4d11a40239 xfs: remove bitfield based superblock updates 
When we log changes to the superblock, we first have to write them
to the on-disk buffer, and then log that. Right now we have a
complex bitfield based arrangement to only write the modified field
to the buffer before we log it.

This used to be necessary as a performance optimisation because we
logged the superblock buffer in every extent or inode allocation or
freeing, and so performance was extremely important. We haven't done
this for years, however, ever since the lazy superblock counters
pulled the superblock logging out of the transaction commit
fast path.

Hence we have a bunch of complexity that is not necessary that makes
writing the in-core superblock to disk much more complex than it
needs to be. We only need to log the superblock now during
management operations (e.g. during mount, unmount or quota control
operations) so it is not a performance critical path anymore.

As such, remove the complex field based logging mechanism and
replace it with a simple conversion function similar to what we use
for all other on-disk structures.

This means we always log the entirity of the superblock, but again
because we rarely modify the superblock this is not an issue for log
bandwidth or CPU time. Indeed, if we do log the superblock
frequently, delayed logging will minimise the impact of this
overhead.

[Fixed gquota/pquota inode sharing regression noticed by bfoster.]

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
 		2015-01-22 09:10:26 +11:00
..
9p assorted conversions to %p[dD] 2014-11-19 13:01:20 -05:00
adfs adfs: add __printf verification, fix format/argument mismatches 2014-08-08 15:57:24 -07:00
affs fs/affs/file.c: remove obsolete pagesize check 2014-12-13 12:42:52 -08:00
afs Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
autofs4 assorted conversions to %p[dD] 2014-11-19 13:01:20 -05:00
befs befs: remove dead code 2014-12-13 12:42:51 -08:00
bfs fs/bfs: use bfs prefix for dump_imap 2014-08-08 15:57:24 -07:00
btrfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-19 18:19:19 -08:00
cachefiles assorted conversions to %p[dD] 2014-11-19 13:01:20 -05:00
ceph Ceph: remove left-over reject file 2014-12-17 18:47:01 -08:00
cifs Merge branch 'akpm' (patchbomb from Andrew) 2014-12-10 18:34:42 -08:00
coda coda_venus_readdir(): use file_inode() 2014-12-11 16:28:12 -05:00
configfs assorted conversions to %p[dD] 2014-11-19 13:01:20 -05:00
cramfs fs/cramfs/inode.c: use linux/uaccess.h 2014-08-08 15:57:25 -07:00
debugfs Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
devpts
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dlm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-10 16:10:49 -08:00
ecryptfs Fixes for filename decryption and encrypted view plus a cleanup 2014-12-19 18:15:12 -08:00
efivarfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-10 16:10:49 -08:00
efs fs/efs/namei.c: return is not a function 2014-08-08 15:57:18 -07:00
exofs Boaz Harrosh - Fix broken email address 2014-10-19 20:22:32 +03:00
exportfs move d_rcu from overlapping d_child to overlapping d_alias 2014-11-03 15:20:29 -05:00
ext2 ext2: Convert to private i_dquot field 2014-11-10 10:06:10 +01:00
ext3 ext3: Convert to private i_dquot field 2014-11-10 10:06:10 +01:00
ext4 move_extent_per_page(): get rid of unused w_flags 2014-12-17 06:43:56 -05:00
f2fs f2fs: avoid to ra unneeded blocks in recover flow 2014-12-08 14:19:09 -08:00
fat fat: fix data past EOF resulting from fsx testsuite 2014-12-13 12:42:51 -08:00
freevxfs
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fscache fs/fscache/object-list.c: use __seq_open_private() 2014-10-13 17:52:21 +01:00
fuse Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse 2014-12-17 09:41:32 -08:00
gfs2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-10 16:10:49 -08:00
hfs fs/hfs/catalog.c: fix comparison bug in hfs_cat_keycmp 2014-12-10 17:41:16 -08:00
hfsplus hfsplus: fix longname handling 2014-12-18 19:08:10 -08:00
hostfs hostfs: support rename flags 2014-08-07 14:40:09 -04:00
hpfs fs/hpfs/dnode.c: fix suspect code indent 2014-08-08 15:57:22 -07:00
hppfs vfs: make first argument of dir_context.actor typed 2014-10-31 17:48:54 -04:00
hugetlbfs mm: convert i_mmap_mutex to rwsem 2014-12-13 12:42:45 -08:00
isofs Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2014-12-16 15:46:01 -08:00
jbd jbd: Deletion of an unnecessary check before the function call "iput" 2014-11-18 10:15:29 +01:00
jbd2 Lots of bugs fixes, including Zheng and Jan's extent status shrinker 2014-12-12 09:28:03 -08:00
jffs2 jffs2: Drop bogus if in comment 2014-11-28 18:23:44 -08:00
jfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-10 16:10:49 -08:00
kernfs vm_area_operations: kill ->migrate() 2014-12-17 08:26:51 -05:00
lockd Merge branch 'for-3.19' of git://linux-nfs.org/~bfields/linux 2014-12-16 15:25:31 -08:00
logfs fs/logfs/readwrite.c: kernel-doc warning fixes 2014-08-06 18:01:12 -07:00
minix minix zmap block counts calculation fix 2014-08-08 15:57:20 -07:00
ncpfs Merge branch 'akpm' (patchbomb from Andrew) 2014-12-10 18:34:42 -08:00
nfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-10 16:10:49 -08:00
nfs_common lockd: move lockd's grace period handling into its own module 2014-09-17 16:33:11 -04:00
nfsd Merge branch 'for-3.19' of git://linux-nfs.org/~bfields/linux 2014-12-16 15:25:31 -08:00
nilfs2 nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races 2014-12-10 17:41:16 -08:00
nls
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notify fsnotify: remove destroy_list from fsnotify_mark 2014-12-13 12:42:53 -08:00
ntfs assorted conversions to %p[dD] 2014-11-19 13:01:20 -05:00
ocfs2 ocfs2: fix journal commit deadlock 2014-12-18 19:08:11 -08:00
omfs FS/OMFS: block number sanity check during fill_super operation 2014-10-14 02:18:22 +02:00
openpromfs
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overlayfs Merge branch 'iov_iter' into for-next 2014-12-08 20:39:29 -05:00
proc Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-19 13:26:08 -08:00
pstore Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
qnx4
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qnx6 fs/qnx6: update debugging to current functions 2014-08-08 15:57:26 -07:00
quota vfs: Remove i_dquot field from inode 2014-11-10 10:06:18 +01:00
ramfs fs/ramfs/file-nommu.c: replace count*size kzalloc by kcalloc 2014-08-08 15:57:18 -07:00
reiserfs Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2014-12-16 15:46:01 -08:00
romfs fs/romfs/super.c: add blank line after declarations 2014-08-08 15:57:25 -07:00
squashfs Squashfs: Add LZ4 compression configuration option 2014-11-27 18:48:44 +00:00
sysfs sysfs/kernfs: make read requests on pre-alloc files use the buffer. 2014-11-07 10:54:38 -08:00
sysv
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ubifs UBIFS: fix a couple bugs in UBIFS xattr length calculation 2014-11-07 12:32:22 +02:00
udf udf: One function call less in udf_fill_super() after error detection 2014-11-19 21:56:06 +01:00
ufs fs/ufs/balloc.c: remove unused variable 2014-10-14 02:18:20 +02:00
xfs xfs: remove bitfield based superblock updates 2015-01-22 09:10:26 +11:00
Kconfig overlay filesystem 2014-10-24 00:14:38 +02:00
Kconfig.binfmt binfmt_elf: allow arch code to examine PT_LOPROC ... PT_HIPROC headers 2014-11-24 07:45:02 +01:00
Makefile Merge branch 'nsfs' into for-next 2014-12-10 21:31:59 -05:00
aio.c aio: Skip timer for io_getevents if timeout=0 2014-12-13 17:50:20 -05:00
anon_inodes.c
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attr.c fs,userns: Change inode_capable to capable_wrt_inode_uidgid 2014-06-10 13:57:22 -07:00
bad_inode.c bad_inode: add ->rename2() 2014-08-07 14:40:09 -04:00
binfmt_aout.c assorted conversions to %p[dD] 2014-11-19 13:01:20 -05:00
binfmt_elf.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-12-11 17:56:37 -08:00
binfmt_elf_fdpic.c handle suicide on late failure exits in execve() in search_binary_handler() 2014-10-09 02:39:00 -04:00
binfmt_em86.c syscalls: implement execveat() system call 2014-12-13 12:42:51 -08:00
binfmt_flat.c
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binfmt_misc.c unfuck binfmt_misc.c (broken by commit e6084d4) 2014-12-17 08:27:14 -05:00
binfmt_script.c syscalls: implement execveat() system call 2014-12-13 12:42:51 -08:00
binfmt_som.c
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block_dev.c fs: add freeze_super/thaw_super fs hooks 2014-11-17 10:35:17 +00:00
buffer.c fs: clarify rate limit suppressed buffer I/O errors 2014-10-21 13:55:11 -06:00
char_dev.c fs/char_dev.c: remove pointless assignment from __register_chrdev_region() 2014-12-10 17:41:04 -08:00
compat.c vfs: make first argument of dir_context.actor typed 2014-10-31 17:48:54 -04:00
compat_binfmt_elf.c
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compat_ioctl.c Bluetooth: Move HCI socket definitions into its own header file 2014-07-11 13:53:04 +03:00
coredump.c coredump: add %i/%I in core_pattern to report the tid of the crashed thread 2014-10-14 02:18:21 +02:00
dcache.c Merge branch 'iov_iter' into for-next 2014-12-08 20:39:29 -05:00
dcookies.c
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direct-io.c fuse: honour max_read and max_write in direct_io mode 2014-09-26 21:16:51 -04:00
drop_caches.c mm: vmscan: invoke slab shrinkers from shrink_zone() 2014-12-13 12:42:48 -08:00
eventfd.c fs: Convert show_fdinfo functions to void 2014-11-05 14:13:23 -05:00
eventpoll.c fs: Convert show_fdinfo functions to void 2014-11-05 14:13:23 -05:00
exec.c syscalls: implement execveat() system call 2014-12-13 12:42:51 -08:00
fcntl.c security: make security_file_set_fowner, f_setown and __f_setown void return 2014-09-09 16:01:36 -04:00
fhandle.c
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file.c fs/file.c: replace get_unused_fd() with get_unused_fd_flags(0) 2014-12-10 17:41:10 -08:00
file_table.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-10-13 11:28:42 +02:00
filesystems.c
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fs-writeback.c writeback: fix a subtle race condition in I_DIRTY clearing 2014-11-04 10:42:23 -07:00
fs_pin.c make fs/{namespace,super}.c forget about acct.h 2014-08-07 14:40:09 -04:00
fs_struct.c
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inode.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-16 15:53:03 -08:00
internal.h take the targets of /proc/*/ns/* symlinks to separate fs 2014-12-10 21:30:20 -05:00
ioctl.c Merge branch 'for-3.19' of git://linux-nfs.org/~bfields/linux 2014-12-16 15:25:31 -08:00
libfs.c move d_rcu from overlapping d_child to overlapping d_alias 2014-11-03 15:20:29 -05:00
locks.c locks: flock_make_lock should return a struct file_lock (or PTR_ERR) 2014-10-07 14:06:13 -04:00
mbcache.c fs/mbcache: replace __builtin_log2() with ilog2() 2014-06-25 22:08:29 -04:00
mount.h common object embedded into various struct ....ns 2014-12-04 14:31:00 -05:00
mpage.c vfs: guard end of device for mpage interface 2014-10-09 22:25:53 -04:00
namei.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-16 15:53:03 -08:00
namespace.c mnt: Fix a memory stomp in umount 2014-12-18 11:22:02 -08:00
no-block.c
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nsfs.c take the targets of /proc/*/ns/* symlinks to separate fs 2014-12-10 21:30:20 -05:00
open.c Merge branch 'for-3.19' of git://linux-nfs.org/~bfields/linux 2014-12-16 15:25:31 -08:00
pipe.c
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pnode.c mnt: Move the clear of MNT_LOCKED from copy_tree to it's callers. 2014-12-02 10:46:50 -06:00
pnode.h
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posix_acl.c
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proc_namespace.c vfs: make mounts and mountstats honor root dir like mountinfo does 2014-12-17 08:27:15 -05:00
read_write.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2014-12-14 20:36:37 -08:00
readdir.c vfs: make first argument of dir_context.actor typed 2014-10-31 17:48:54 -04:00
select.c
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seq_file.c fs, seq_file: fallback to vmalloc instead of oom kill processes 2014-12-13 12:42:49 -08:00
signalfd.c fs: Convert show_fdinfo functions to void 2014-11-05 14:13:23 -05:00
splice.c vfs: export do_splice_direct() to modules 2014-10-24 00:14:35 +02:00
stack.c fs: fix comment for 'CONFIG_LBADF' 2014-08-26 09:35:56 +02:00
stat.c
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statfs.c
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super.c vfs: Remove i_dquot field from inode 2014-11-10 10:06:18 +01:00
sync.c kill f_dentry uses 2014-11-19 13:01:25 -05:00
timerfd.c fs: Convert show_fdinfo functions to void 2014-11-05 14:13:23 -05:00
utimes.c
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xattr.c new helper: audit_file() 2014-11-19 13:01:26 -05:00