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240930fb7e
linux/fs/ext4
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Zhang Yi 240930fb7e ext4: dio take shared inode lock when overwriting preallocated blocks 
In the dio write path, we only take shared inode lock for the case of
aligned overwriting initialized blocks inside EOF. But for overwriting
preallocated blocks, it may only need to split unwritten extents, this
procedure has been protected under i_data_sem lock, it's safe to
release the exclusive inode lock and take shared inode lock.

This could give a significant speed up for multi-threaded writes. Test
on Intel Xeon Gold 6140 and nvme SSD with below fio parameters.

 direct=1
 ioengine=libaio
 iodepth=10
 numjobs=10
 runtime=60
 rw=randwrite
 size=100G

And the test result are:
Before:
 bs=4k       IOPS=11.1k, BW=43.2MiB/s
 bs=16k      IOPS=11.1k, BW=173MiB/s
 bs=64k      IOPS=11.2k, BW=697MiB/s

After:
 bs=4k       IOPS=41.4k, BW=162MiB/s
 bs=16k      IOPS=41.3k, BW=646MiB/s
 bs=64k      IOPS=13.5k, BW=843MiB/s

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20221226062015.3479416-1-yi.zhang@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2023-02-14 21:23:38 -05:00
..
.kunitconfig ext4: add .kunitconfig fragment to enable ext4-specific tests 2021-02-11 23:16:30 -05:00
acl.c fs: pass dentry to set acl method 2022-10-19 12:55:42 +02:00
acl.h fs: pass dentry to set acl method 2022-10-19 12:55:42 +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: split ext4_journal_start trace for debug 2022-12-01 10:46:54 -05:00
ext4_jbd2.h ext4: split ext4_journal_start trace for debug 2022-12-01 10:46:54 -05:00
ext4.h ext4: switch to using ext4_do_writepages() for ordered data writeout 2022-12-08 21:49:25 -05:00
extents_status.c ext4: fix reserved cluster accounting in __es_remove_extent() 2022-12-09 00:58:04 -05:00
extents_status.h
extents.c ext4: fix delayed allocation bug in ext4_clu_mapped for bigalloc + inline 2022-12-08 21:49:25 -05:00
fast_commit.c ext4: use ext4_fc_tl_mem in fast-commit replay path 2023-02-09 10:43:23 -05:00
fast_commit.h ext4: add missing validation of fast-commit record lengths 2022-12-08 21:49:24 -05:00
file.c ext4: dio take shared inode lock when overwriting preallocated blocks 2023-02-14 21:23:38 -05:00
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 A large number of cleanups and bug fixes, with many of the bug fixes 2022-12-12 19:56:37 -08:00
indirect.c ext4: fix error code return to user-space in ext4_get_branch() 2022-12-08 21:49:24 -05:00
inline.c fs/ext4: replace ternary operator with min()/max() and min_t() 2022-11-29 16:10:49 -05:00
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 A large number of cleanups and bug fixes, with many of the bug fixes 2022-12-12 19:56:37 -08:00
ioctl.c ext4: initialize quota before expanding inode in setproject ioctl 2022-12-08 22:03:15 -05:00
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: make ext4_mb_initialize_context return void 2022-12-08 21:49:25 -05:00
mballoc.h ext4: use buckets for cr 1 block scan instead of rbtree 2022-09-21 22:12:03 -04:00
migrate.c ext4: fix warning in 'ext4_da_release_space' 2022-11-06 01:07:59 -04:00
mmp.c treewide: use get_random_u32_{above,below}() instead of manual loop 2022-11-18 02:15:22 +01:00
move_extent.c ext4: convert move_extent_per_page() to use folios 2022-11-30 15:59:02 -08:00
namei.c A large number of cleanups and bug fixes, with many of the bug fixes 2022-12-12 19:56:37 -08:00
orphan.c ext4: remove trailing newline from ext4_msg() message 2022-12-08 21:49:23 -05:00
page-io.c ext4: drop pointless IO submission from ext4_bio_write_page() 2022-12-08 21:49:25 -05:00
readpage.c fsverity updates for 6.2 2022-12-12 20:06:35 -08:00
resize.c ext4: fix corruption when online resizing a 1K bigalloc fs 2022-12-08 21:49:24 -05:00
super.c ext4: don't show commit interval if it is zero 2023-02-09 10:43:23 -05:00
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 fs: ext4: initialize fsdata in pagecache_write() 2022-12-08 21:49:25 -05:00
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: improve xattr consistency checking and error reporting 2023-02-09 10:35:12 -05:00
xattr.h ext4: remove EA inode entry from mbcache on inode eviction 2022-08-02 23:56:25 -04:00