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android_kernel_google_msm/fs
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Jan Kara 3b1a823ca1 writeback: Fix occasional slow sync(1) 
In case when system contains no dirty pages, wakeup_flusher_threads()
will submit WB_SYNC_NONE writeback for 0 pages so wb_writeback() exits
immediately without doing anything. Thus sync(1) will write all the
dirty inodes from a WB_SYNC_ALL writeback pass which is slow.

Fix the problem by using get_nr_dirty_pages() in
wakeup_flusher_threads() instead of calculating number of dirty pages
manually. That function also takes number of dirty inodes into account.

Change-Id: I458027ae08d9a5a93202a7b97ace1f8da7a18a07
CC: stable@vger.kernel.org
Reported-by: Paul Taysom <taysom@chromium.org>
Signed-off-by: Jan Kara <jack@suse.cz>
2016-10-29 23:12:17 +08:00
..
9p 9p changes for the 3.4 merge window 2012-03-28 09:58:38 -07:00
adfs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
affs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
afs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-03-21 13:36:41 -07:00
autofs4 autofs: make the autofsv5 packet file descriptor use a packetized pipe 2012-04-29 13:30:08 -07:00
befs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
bfs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
btrfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2012-05-06 10:20:07 -07:00
cachefiles switch touch_atime to struct path 2012-03-20 21:29:41 -04:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2012-03-28 10:01:29 -07:00
cifs freezer: add unsafe versions of freezable helpers for CIFS 2013-07-12 14:22:55 -07:00
coda Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
configfs make configfs_pin_fs() return root dentry on success 2012-03-20 21:29:48 -04:00
cramfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-03-21 13:36:41 -07:00
debugfs simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
devpts Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-03-21 13:36:41 -07:00
dlm dlm fixes for 3.4 2012-04-23 18:22:42 -07:00
ecryptfs eCryptfs: Remove buggy and unnecessary write in file name decode routine 2016-10-29 23:12:10 +08:00
efs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
exofs Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd 2012-03-28 20:04:27 -07:00
exportfs
ext2 migrate ext2_fs.h guts to fs/ext2/ext2.h 2012-03-31 16:03:16 -04:00
ext3 ext3: move headers to fs/ext3/ 2012-03-31 16:03:16 -04:00
ext4 ext4: protect group inode free counting with group lock 2013-04-18 16:07:55 -07:00
f2fs f2fs: catch up to v4.4-rc1 2016-10-29 23:12:16 +08:00
fat fs: fat: rate limit the kernel messages 2013-02-20 02:49:28 -08:00
freevxfs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
fscache
fuse fuse: break infinite loop in fuse_fill_write_pages() 2016-10-29 23:12:16 +08:00
gfs2 GFS2: Instruct DLM to avoid queue convert slowdown 2012-04-24 13:26:50 +01:00
hfs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
hfsplus hfsplus: Fix potential buffer overflows 2012-05-04 17:11:24 -07:00
hostfs Merge branch 'for-linus-3.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml 2012-03-27 18:29:53 -07:00
hpfs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
hppfs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
hugetlbfs hugetlbfs: lockdep annotate root inode properly 2012-04-25 21:26:34 -07:00
isofs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
jbd Power management updates for 3.4 2012-03-21 10:15:51 -07:00
jbd2 jbd2: use GFP_NOFS for blkdev_issue_flush 2012-04-23 21:43:41 -04:00
jffs2 jffs2: Fix lock acquisition order bug in gc path 2012-05-07 20:30:14 +01:00
jfs jfs: mising cleanup on register_filesystem() failure 2012-03-20 21:29:48 -04:00
lockd lockd: fix the endianness bug 2012-04-13 13:50:52 -04:00
logfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-03-21 13:36:41 -07:00
minix Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-03-21 13:36:41 -07:00
ncpfs fs: introduce inode operation ->update_time 2015-07-13 11:17:49 -07:00
nfs freezer: add unsafe versions of freezable helpers for NFS 2013-07-12 14:22:55 -07:00
nfs_common
nfsd nfsd: fix nfs4recover.c printk format warning 2012-04-30 12:28:48 -07:00
nilfs2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-03-21 13:36:41 -07:00
nls
notify fs/notify/notification.c: make subsys_initcall function static 2012-03-23 16:58:31 -07:00
ntfs fs: introduce inode operation ->update_time 2015-07-13 11:17:49 -07:00
ocfs2 ocfs2: ->e_leaf_clusters endianness breakage 2012-04-13 12:31:43 -04:00
omfs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
openpromfs switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
proc UPSTREAM: proc: actually make proc_fd_permission() thread-friendly 2016-10-29 23:12:14 +08:00
pstore Merge branch 'akpm' (Andrew's patch-bomb) 2012-04-05 15:30:34 -07:00
qnx4 qnx4: new helper - try_extent() 2012-03-20 21:29:52 -04:00
qnx6 fs: initial qnx6fs addition 2012-03-20 21:29:38 -04:00
quota Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2012-03-28 10:00:14 -07:00
ramfs tidy up after d_make_root() conversion 2012-03-20 21:29:37 -04:00
reiserfs Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
romfs MTD merge for 3.4 2012-03-30 17:31:56 -07:00
squashfs Add an extra mount time sanity check, plus some code cleanups and bug fixes. 2012-03-28 18:05:54 -07:00
sysfs sysfs: handle 'parent deleted before child added' 2012-04-10 14:48:51 -07:00
sysv switch open-coded instances of d_make_root() to new helper 2012-03-20 21:29:35 -04:00
ubifs ubifs: Fix compiler warning 2013-02-27 18:10:47 -08:00
udf Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2012-03-28 10:00:14 -07:00
ufs Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
xfs fs: introduce inode operation ->update_time 2015-07-13 11:17:49 -07:00
yaffs2 fs: yaffs2: Add null pointer check before dereferencing inode 2013-02-27 18:19:17 -08:00
aio.c UPSTREAM: vfs: make AIO use the proper rw_verify_area() area helpers 2016-06-20 19:00:55 +00:00
anon_inodes.c anon_inodes: move allocation of anon_inode into ->mount() 2012-03-20 21:29:45 -04:00
attr.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
bad_inode.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
binfmt_aout.c VM: add "vm_mmap()" helper function 2012-04-20 17:29:13 -07:00
binfmt_elf.c VM: add "vm_mmap()" helper function 2012-04-20 17:29:13 -07:00
binfmt_elf_fdpic.c VM: add "vm_mmap()" helper function 2012-04-20 17:29:13 -07:00
binfmt_em86.c __register_binfmt() made void 2012-03-20 21:29:46 -04:00
binfmt_flat.c VM: add "vm_mmap()" helper function 2012-04-20 17:29:13 -07:00
binfmt_misc.c magic.h: move some FS magic numbers into magic.h 2012-03-23 16:58:31 -07:00
binfmt_script.c __register_binfmt() made void 2012-03-20 21:29:46 -04:00
binfmt_som.c VM: add "vm_mmap()" helper function 2012-04-20 17:29:13 -07:00
bio-integrity.c fs: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:21 +08:00
bio.c bio allocation failure due to bio_get_nr_vecs() 2012-05-11 16:45:12 +02:00
block_dev.c block: don't mark buffers beyond end of disk as mapped 2012-05-11 16:42:14 +02:00
buffer.c block: fix infinite loop in __getblk_slow 2013-03-15 17:09:41 -07:00
char_dev.c
compat.c Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-03-29 18:12:23 -07:00
compat_binfmt_elf.c
compat_ioctl.c fs: Add TTY PM IOCTLs to compat table 2016-10-29 23:08:34 +08:00
dcache.c get rid of ->mnt_longterm 2015-07-13 11:17:44 -07:00
dcookies.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
direct-io.c Restore direct_io / truncate locking API 2012-02-23 15:56:21 -08:00
drop_caches.c
eventfd.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
eventpoll.c epoll: use freezable blocking call 2013-07-12 14:22:57 -07:00
exec.c fs: take i_mutex during prepare_binprm for set[ug]id executables 2016-10-29 23:12:10 +08:00
fcntl.c Wrap accesses to the fd_sets in struct fdtable 2012-02-19 10:30:52 -08:00
fhandle.c vfs: read file_handle only once in handle_to_path 2016-10-29 23:12:11 +08:00
fifo.c
file.c Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-03-29 18:12:23 -07:00
file_table.c brlocks/lglocks: API cleanups 2015-07-13 11:17:41 -07:00
filesystems.c
fs-writeback.c writeback: Fix occasional slow sync(1) 2016-10-29 23:12:17 +08:00
fs_struct.c get rid of ->mnt_longterm 2015-07-13 11:17:44 -07:00
generic_acl.c
inode.c fs: introduce inode operation ->update_time 2015-07-13 11:17:49 -07:00
internal.h get rid of ->mnt_longterm 2015-07-13 11:17:44 -07:00
ioctl.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
ioprio.c block: strip out locking optimization in put_io_context() 2012-02-07 07:51:30 +01:00
Kconfig f2fs: catch up to v4.4-rc1 2016-10-29 23:12:16 +08:00
Kconfig.binfmt
libfs.c dentry leak in simple_fill_super() failure exit 2012-04-09 01:39:22 -04:00
locks.c CIFS: Fix VFS lock usage for oplocked files 2012-04-01 13:54:27 -05:00
Makefile f2fs: catch up to v4.4-rc1 2016-10-29 23:12:16 +08:00
mbcache.c
mount.h proc: Usable inode numbers for the namespace file descriptors. 2015-07-13 11:18:01 -07:00
mpage.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
namei.c VFS: Comment mount following code 2015-07-13 11:17:48 -07:00
namespace.c mnt: Only change user settable mount flags in remount 2016-10-29 23:12:11 +08:00
no-block.c
open.c vfs: check if f_count is 0 or negative 2014-12-04 13:01:58 -08:00
pipe.c pipe: iovec: Fix OOB read in pipe_read() 2016-03-24 09:36:08 -07:00
pnode.c VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors 2015-07-13 11:17:46 -07:00
pnode.h vfs: Only support slave subtrees across different user namespaces 2015-07-13 11:17:56 -07:00
posix_acl.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
proc_namespace.c get rid of magic in proc_namespace.c 2015-07-13 11:17:45 -07:00
read_write.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
read_write.h
readdir.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
select.c select: use freezable blocking call 2013-07-12 14:22:58 -07:00
seq_file.c fs/seq_file: Use vmalloc by default for allocations > PAGE_SIZE 2014-11-18 15:13:24 -08:00
signalfd.c epoll: ep_unregister_pollwait() can use the freed pwq->whead 2012-02-24 11:42:50 -08:00
splice.c fs: introduce inode operation ->update_time 2015-07-13 11:17:49 -07:00
stack.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
stat.c The following text was taken from the original review request: 2012-03-24 10:24:31 -07:00
statfs.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
super.c The following text was taken from the original review request: 2012-03-24 10:24:31 -07:00
sync.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00
timerfd.c
utimes.c
xattr.c fs/xattr.c:setxattr(): improve handling of allocation failures 2012-04-05 15:25:50 -07:00
xattr_acl.c fs: reduce the use of module.h wherever possible 2012-02-28 19:31:58 -05:00