Konstantin Khlebnikov 32b1924b21 ovl: skip overlayfs superblocks at global sync ... Stacked filesystems like overlayfs has no own writeback, but they have to forward syncfs() requests to backend for keeping data integrity. During global sync() each overlayfs instance calls method ->sync_fs() for backend although it itself is in global list of superblocks too. As a result one syscall sync() could write one superblock several times and send multiple disk barriers. This patch adds flag SB_I_SKIP_SYNC into sb->sb_iflags to avoid that. Reported-by: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru> Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>		2020-05-13 11:11:24 +02:00
..
copy_up.c	ovl: prepare to copy up without workdir	2020-05-13 11:11:24 +02:00
dir.c	ovl: fix WARN_ON nlink drop to zero	2020-03-27 16:51:02 +01:00
export.c	ovl: potential crash in ovl_fid_to_fh()	2020-05-13 11:10:57 +02:00
file.c	ovl: fix lockdep warning for async write	2020-03-13 15:53:06 +01:00
inode.c	ovl: clear ATTR_OPEN from attr->ia_valid	2020-04-30 11:52:07 +02:00
Kconfig	ovl: fix some xino configurations	2020-03-13 15:53:06 +01:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
namei.c	ovl: cleanup non-empty directories in ovl_indexdir_cleanup()	2020-05-13 11:11:24 +02:00
overlayfs.h	ovl: cleanup non-empty directories in ovl_indexdir_cleanup()	2020-05-13 11:11:24 +02:00
ovl_entry.h	ovl: use a private non-persistent ino pool	2020-03-27 16:51:02 +01:00
readdir.c	ovl: cleanup non-empty directories in ovl_indexdir_cleanup()	2020-05-13 11:11:24 +02:00
super.c	ovl: skip overlayfs superblocks at global sync	2020-05-13 11:11:24 +02:00
util.c	ovl: allow remote upper	2020-03-17 15:04:22 +01:00