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android_kernel_google_msm/fs
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Jan Kara 24f88dea2a fs/sync.c: make sync_file_range(2) use WB_SYNC_NONE writeback 
sync_file_range(2) is documented to issue writeback only for pages that
are not currently being written.  After all the system call has been
created for userspace to be able to issue background writeout and so
waiting for in-flight IO is undesirable there.  However commit
ee53a891f4 ("mm: do_sync_mapping_range integrity fix") switched
do_sync_mapping_range() and thus sync_file_range() to issue writeback in
WB_SYNC_ALL mode since do_sync_mapping_range() was used by other code
relying on WB_SYNC_ALL semantics.

These days do_sync_mapping_range() went away and we can switch
sync_file_range(2) back to issuing WB_SYNC_NONE writeback.  That should
help PostgreSQL avoid large latency spikes when flushing data in the
background.

Andres measured a 20% increase in transactions per second on an SSD disk.

Signed-off-by: Jan Kara <jack@suse.com>
Reported-by: Andres Freund <andres@anarazel.de>
Tested-By: Andres Freund <andres@anarazel.de>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-12-31 13:02:49 +03:00
..
9p Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
adfs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
affs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
afs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
autofs4 Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
befs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
bfs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
btrfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
cachefiles FS-Cache: Handle a write to the page immediately beyond the EOF marker 2016-10-26 23:15:25 +08:00
ceph Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
cifs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
coda fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
configfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
cramfs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
crypto ext4/fscrypto: avoid RCU lookup in d_revalidate 2016-10-29 23:12:37 +08:00
debugfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
devpts Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
dlm
ecryptfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
efs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
exofs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
exportfs move d_rcu from overlapping d_child to overlapping d_alias 2017-09-22 19:11:55 +03:00
ext2 Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
ext3 Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
ext4 ext4: Add support for FIDTRIM, a best-effort ioctl for deep discard trim 2017-12-27 22:40:01 +03:00
f2fs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
fat Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
freevxfs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
fscache FS-Cache: Handle a write to the page immediately beyond the EOF marker 2016-10-26 23:15:25 +08:00
fuse Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
gfs2 Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
hfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
hfsplus Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
hostfs fs: create and use seq_show_option for escaping 2016-04-27 18:55:18 +08:00
hpfs hpfs: update ctime and mtime on directory modification 2016-04-27 18:55:17 +08:00
hppfs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
hugetlbfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
isofs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
jbd
jbd2 jbd2: Fix unreclaimed pages after truncate in data=journal mode 2016-10-26 23:15:34 +08:00
jffs2 Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
jfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
lockd lockd: Try to reconnect if statd has moved 2015-02-02 17:04:42 +08:00
logfs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
minix fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
ncpfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
nfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
nfs_common
nfsd Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
nilfs2 Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
nls
notify Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
ntfs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
ocfs2 Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
omfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
openpromfs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
proc BACKPORT: mm: /proc/pid/smaps:: show proportional swap share of the mapping 2017-12-27 22:48:40 +03:00
pstore
qnx4 fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
qnx6 fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
quota quota: Fix race between dqput() and dquot_scan_active() 2014-03-11 16:10:02 -07:00
ramfs
reiserfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
romfs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
sdcardfs sdcardfs: Backport and use some 3.10 hlist/hash macros 2017-10-06 10:28:58 +03:00
squashfs
sysfs
sysv Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
ubifs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
udf udf: Check path length when reading symlink 2017-07-10 01:48:57 +03:00
ufs fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
xfs Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
yaffs2
aio.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
anon_inodes.c
attr.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
bad_inode.c
binfmt_aout.c
binfmt_elf.c binfmt_elf: Don't clobber passed executable's file header 2016-10-26 23:15:28 +08:00
binfmt_elf_fdpic.c
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
binfmt_script.c
binfmt_som.c
bio-integrity.c
bio.c SCSI: sg: Fix user memory corruption when SG_IO is interrupted by a signal 2013-09-07 21:58:16 -07:00
block_dev.c writeback: Fix periodic writeback after fs mount 2013-07-28 16:26:08 -07:00
buffer.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
char_dev.c
compat.c
compat_binfmt_elf.c
compat_ioctl.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
dcache.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
dcookies.c
direct-io.c
drop_caches.c
eventfd.c
eventpoll.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
exec.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
fcntl.c
fhandle.c vfs: read file_handle only once in handle_to_path 2016-10-29 23:12:11 +08:00
fifo.c
file.c fs/file.c:fdtable: avoid triggering OOMs from alloc_fdmem 2014-02-22 10:32:45 -08:00
file_table.c get rid of s_files and files_lock 2016-03-21 09:17:55 +08:00
filesystems.c fs: Limit sys_mount to only request filesystem modules. 2017-09-22 19:12:20 +03:00
fs-writeback.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
fs_struct.c sdcardfs: override umask on mkdir and create 2017-09-22 19:12:02 +03:00
generic_acl.c BACKPORT: posix_acl: Clear SGID bit when setting file permissions 2017-06-26 20:26:17 +03:00
inode.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
internal.h Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
ioctl.c
ioprio.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
Kconfig Included sdcardfs source code for kernel 3.0 2017-09-22 19:11:56 +03:00
Kconfig.binfmt
libfs.c move d_rcu from overlapping d_child to overlapping d_alias 2017-09-22 19:11:55 +03:00
locks.c locks: allow __break_lease to sleep even when break_time is 0 2014-05-13 14:11:31 +02:00
Makefile Included sdcardfs source code for kernel 3.0 2017-09-22 19:11:56 +03:00
mbcache.c
mount.h proc: Usable inode numbers for the namespace file descriptors. 2015-07-13 11:18:01 -07:00
mpage.c
namei.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
namespace.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
no-block.c
open.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
pipe.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
pnode.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
pnode.h ANDROID: mnt: remount should propagate to slaves of slaves 2017-09-22 19:12:11 +03:00
posix_acl.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
proc_namespace.c vfs: Allow filesystems to access their private mount data 2017-09-22 19:12:06 +03:00
read_write.c
read_write.h
readdir.c kernel: Only expose su when daemon is running 2017-05-19 18:41:25 -06:00
select.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
seq_file.c fs/seq_file: Use vmalloc by default for allocations > PAGE_SIZE 2014-11-18 15:13:24 -08:00
signalfd.c
splice.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
stack.c
stat.c VFS: make vfs_fstat() use f[get|put]_light() 2014-06-07 16:02:04 -07:00
statfs.c vfs: allow O_PATH file descriptors for fstatfs() 2013-10-22 09:02:25 +01:00
super.c Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1 2017-12-27 17:13:15 +03:00
sync.c fs/sync.c: make sync_file_range(2) use WB_SYNC_NONE writeback 2017-12-31 13:02:49 +03:00
timerfd.c timerfd: support CLOCK_BOOTTIME clock 2017-08-27 19:07:23 +03:00
utimes.c vfs: Add setattr2 for filesystems with per mount permissions 2017-09-22 19:12:07 +03:00
xattr.c
xattr_acl.c