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c2888c460d
android_kernel_samsung_sm8650/fs/gfs2
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Andreas Gruenbacher c2888c460d gfs2: Don't get stuck writing page onto itself under direct I/O 
[ Upstream commit fa58cc888d67e640e354d8b3ceef877ea167b0cf ]

When a direct I/O write is performed, iomap_dio_rw() invalidates the
part of the page cache which the write is going to before carrying out
the write.  In the odd case, the direct I/O write will be reading from
the same page it is writing to.  gfs2 carries out writes with page
faults disabled, so it should have been obvious that this page
invalidation can cause iomap_dio_rw() to never make any progress.
Currently, gfs2 will end up in an endless retry loop in
gfs2_file_direct_write() instead, though.

Break this endless loop by limiting the number of retries and falling
back to buffered I/O after that.

Also simplify should_fault_in_pages() sightly and add a comment to make
the above case easier to understand.

Reported-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-06-28 11:12:38 +02:00
..
acl.c vfs: add rcu argument to ->get_acl() callback 2021-08-18 22:08:24 +02:00
acl.h vfs: add rcu argument to ->get_acl() callback 2021-08-18 22:08:24 +02:00
aops.c gfs2: jdata writepage fix 2023-03-10 09:33:25 +01:00
aops.h gfs2: mark stuffed_readpage static 2019-07-03 14:45:18 +02:00
bmap.c gfs2: Always check inode size of inline inodes 2023-02-09 11:28:27 +01:00
bmap.h gfs2: Clean up gfs2_unstuff_dinode 2021-06-29 10:56:51 +02:00
dentry.c gfs2: untangle the logic in gfs2_drevalidate 2019-09-03 09:42:41 +02:00
dir.c gfs2 fixes 2022-08-06 14:44:49 -07:00
dir.h gfs2: Delete an unnecessary check before brelse() 2019-09-04 20:22:17 +02:00
export.c Change calling conventions for filldir_t 2022-08-17 17:25:04 -04:00
file.c gfs2: Don't get stuck writing page onto itself under direct I/O 2023-06-28 11:12:38 +02:00
gfs2.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
glock.c gfs2: Partially revert gfs2_inode_lookup change 2022-12-31 13:32:45 +01:00
glock.h gfs2: Merge branch 'for-next.nopid' into for-next 2022-10-09 22:56:28 +02:00
glops.c gfs2: Fix inode height consistency check 2023-05-24 17:32:37 +01:00
glops.h gfs2: Split up gfs2_meta_sync into inode and rgrp versions 2020-10-29 22:16:46 +01:00
incore.h gfs2: Make go_instantiate take a glock 2022-06-29 16:59:07 +02:00
inode.c gfs2: Merge branch 'for-next.nopid' into for-next 2022-10-09 22:56:28 +02:00
inode.h gfs2: Convert to release_folio 2022-05-09 23:12:33 -04:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
lock_dlm.c fs: dlm: remove DLM_LSFL_FS from uapi 2022-08-23 14:54:54 -05:00
log.c Revert "gfs2: stop using generic_writepages in gfs2_ail1_start_one" 2023-02-09 11:28:13 +01:00
log.h fs/gfs2: Use the enum req_op and blk_opf_t types 2022-07-14 12:14:32 -06:00
lops.c Folio changes for 6.0 2022-08-03 10:35:43 -07:00
lops.h fs/gfs2: Use the enum req_op and blk_opf_t types 2022-07-14 12:14:32 -06:00
main.c gfs2: Register fs after creating workqueues 2022-09-20 17:53:54 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
meta_io.c gfs2: replace ll_rw_block() 2022-09-11 20:26:06 -07:00
meta_io.h gfs2: Use container_of() for gfs2_glock(aspace) 2022-05-24 21:29:14 +02:00
ops_fstype.c gfs2: Merge branch 'for-next.nopid' into for-next 2022-10-09 22:56:28 +02:00
quota.c gfs2: replace ll_rw_block() 2022-09-11 20:26:06 -07:00
quota.h gfs2: move privileged user check to gfs2_quota_lock_check 2020-05-08 18:47:58 +02:00
recovery.c gfs2: replace 'found' with dedicated list iterator variable 2022-05-14 03:05:55 +02:00
recovery.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
rgrp.c Merge part of branch 'for-next.instantiate' into for-next 2022-08-05 18:37:03 +02:00
rgrp.h Merge part of branch 'for-next.instantiate' into for-next 2022-08-05 18:37:03 +02:00
super.c gfs2: Don't deref jdesc in evict 2023-06-09 10:34:08 +02:00
super.h gfs2: Don't release and reacquire local statfs bh 2021-08-20 09:03:46 -05:00
sys.c block: remove genhd.h 2022-02-02 07:49:59 -07:00
sys.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
trace_gfs2.h gfs2: Remove 'first' trace_gfs2_promote argument 2021-10-25 08:42:19 +02:00
trans.c gfs2: fix use-after-free in trans_drain 2021-03-07 17:04:55 +01:00
trans.h Merge branches 'rgrp-glock-sharing' and 'gfs2-revoke' from https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git 2021-02-23 18:54:22 +01:00
util.c gfs2: Merge branch 'for-next.nopid' into for-next 2022-10-09 22:56:28 +02:00
util.h gfs2: don't stop reads while withdraw in progress 2021-08-20 09:03:46 -05:00
xattr.c gfs2: Minor gfs2_glock_nq_m cleanup 2022-06-28 20:38:15 +02:00
xattr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00