Jinke Han d1052d236e ext4: place buffer head allocation before handle start ... In our product environment, we encounter some jbd hung waiting handles to stop while several writters were doing memory reclaim for buffer head allocation in delay alloc write path. Ext4 do buffer head allocation with holding transaction handle which may be blocked too long if the reclaim works not so smooth. According to our bcc trace, the reclaim time in buffer head allocation can reach 258s and the jbd transaction commit also take almost the same time meanwhile. Except for these extreme cases, we often see several seconds delays for cgroup memory reclaim on our servers. This is more likely to happen considering docker environment. One thing to note, the allocation of buffer heads is as often as page allocation or more often when blocksize less than page size. Just like page cache allocation, we should also place the buffer head allocation before startting the handle. Cc: stable@kernel.org Signed-off-by: Jinke Han <hanjinke.666@bytedance.com> Link: https://lore.kernel.org/r/20220903012429.22555-1-hanjinke.666@bytedance.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>		2022-09-30 23:46:52 -04:00
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.kunitconfig	ext4: add .kunitconfig fragment to enable ext4-specific tests	2021-02-11 23:16:30 -05:00
acl.c	fs/ext4: fix comments mentioning i_mutex	2022-02-03 10:57:53 -05:00
acl.h	vfs: add rcu argument to ->get_acl() callback	2021-08-18 22:08:24 +02:00
balloc.c	ext4: use ext4_debug() instead of jbd_debug()	2022-08-02 23:52:19 -04:00
bitmap.c
block_validity.c	ext4: add ext4_sb_block_valid() refactored out of ext4_inode_block_valid()	2022-02-25 21:34:56 -05:00
crypto.c	ext4: refactor and move ext4_ioctl_get_encryption_pwsalt()	2022-05-21 22:24:24 -04:00
dir.c	ext4: fix spelling errors in comments	2022-05-11 15:19:06 -04:00
ext4_extents.h	ext4: fix sparse warnings	2021-08-30 23:36:50 -04:00
ext4_jbd2.c	ext4: use ext4_debug() instead of jbd_debug()	2022-08-02 23:52:19 -04:00
ext4_jbd2.h	fs/ext4: fix comments mentioning i_mutex	2022-02-03 10:57:53 -05:00
ext4.h	ext4: use buckets for cr 1 block scan instead of rbtree	2022-09-21 22:12:03 -04:00
extents_status.c	mm: shrinkers: provide shrinkers with names	2022-07-03 18:08:40 -07:00
extents_status.h
extents.c	ext4: fix bug in extents parsing when eh_entries == 0 and eh_depth > 0	2022-09-22 10:50:54 -04:00
fast_commit.c	Add new ioctls to set and get the file system UUID in the ext4	2022-08-04 20:13:46 -07:00
fast_commit.h	flexible-array transformations for 5.18-rc1	2022-03-24 11:39:32 -07:00
file.c	ext4: avoid crash when inline data creation follows DIO write	2022-09-29 10:38:41 -04:00
fsmap.c	treewide: Change list_sort to use const pointers	2021-04-08 16:04:22 -07:00
fsmap.h	ext4: fsmap: fix the block/inode bitmap comment	2021-06-24 09:48:29 -04:00
fsync.c	block: use an on-stack bio in blkdev_issue_flush	2021-01-27 09:51:48 -07:00
hash.c	unicode: clean up the Kconfig symbol confusion	2022-01-20 19:57:24 -05:00
ialloc.c	ext4: make directory inode spreading reflect flexbg size	2022-09-21 22:11:55 -04:00
indirect.c	ext4: use ext4_debug() instead of jbd_debug()	2022-08-02 23:52:19 -04:00
inline.c	ext4: correct max_inline_xattr_value_size computing	2022-08-02 23:52:44 -04:00
inode-test.c	fs: ext4: Modify inode-test.c to use KUnit parameterized testing feature	2020-12-02 16:07:25 -07:00
inode.c	ext4: place buffer head allocation before handle start	2022-09-30 23:46:52 -04:00
ioctl.c	ext4: add ioctls to get/set the ext4 superblock uuid	2022-08-02 23:56:26 -04:00
Kconfig	ext: EXT4_KUNIT_TESTS should depend on EXT4_FS instead of selecting it	2021-02-11 23:12:59 -05:00
Makefile	ext4: move ext4 crypto code to its own file crypto.c	2022-05-21 22:24:24 -04:00
mballoc.c	ext4: fixup possible uninitialized variable access in ext4_mb_choose_next_group_cr1()	2022-09-26 13:21:05 -04:00
mballoc.h	ext4: use buckets for cr 1 block scan instead of rbtree	2022-09-21 22:12:03 -04:00
migrate.c	ext4: recover csum seed of tmp_inode after migrating to extents	2022-08-02 23:56:02 -04:00
mmp.c	fs/buffer: Combine two submit_bh() and ll_rw_block() arguments	2022-07-14 12:14:32 -06:00
move_extent.c	ext4: minor defrag code improvements	2022-09-27 16:48:57 -04:00
namei.c	ext4: fix check for block being out of directory size	2022-09-29 23:01:40 -04:00
orphan.c	ext4: use ext4_debug() instead of jbd_debug()	2022-08-02 23:52:19 -04:00
page-io.c	ext4: fix incorrect comment in ext4_bio_write_page()	2022-06-16 11:03:16 -04:00
readpage.c	fs: Convert block_read_full_page() to block_read_full_folio()	2022-05-09 16:21:44 -04:00
resize.c	ext4: continue to expand file system when the target size doesn't reach	2022-09-27 16:40:30 -04:00
super.c	ext4: ext4_read_bh_lock() should submit IO if the buffer isn't uptodate	2022-09-30 23:46:51 -04:00
symlink.c	ext4: fix reading leftover inlined symlinks	2022-08-02 23:37:50 -04:00
sysfs.c	unicode: clean up the Kconfig symbol confusion	2022-01-20 19:57:24 -05:00
truncate.h	ext4: Convert to use mapping->invalidate_lock	2021-07-13 14:29:00 +02:00
verity.c	ext4: Call aops write_begin() and write_end() directly	2022-05-08 14:45:56 -04:00
xattr_hurd.c	acl: handle idmapped mounts	2021-01-24 14:27:17 +01:00
xattr_security.c	acl: handle idmapped mounts	2021-01-24 14:27:17 +01:00
xattr_trusted.c	acl: handle idmapped mounts	2021-01-24 14:27:17 +01:00
xattr_user.c	acl: handle idmapped mounts	2021-01-24 14:27:17 +01:00
xattr.c	ext4: fix race when reusing xattr blocks	2022-08-02 23:56:25 -04:00
xattr.h	ext4: remove EA inode entry from mbcache on inode eviction	2022-08-02 23:56:25 -04:00