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linux/fs/gfs2
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Andreas Gruenbacher fa58cc888d gfs2: Don't get stuck writing page onto itself under direct I/O 
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>
2023-06-01 14:55:43 +02:00
..
acl.c fs: port acl to mnt_idmap 2023-01-19 09:24:28 +01:00
acl.h fs: port ->set_acl() to pass mnt_idmap 2023-01-19 09:24:27 +01:00
aops.c - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
aops.h gfs2: Convert gfs2_page_add_databufs to folios 2023-02-22 12:06:20 +01:00
bmap.c gfs2: Eliminate gfs2_trim_blocks 2023-04-18 14:40:12 +02:00
bmap.h gfs2: Eliminate gfs2_trim_blocks 2023-04-18 14:40:12 +02:00
dentry.c Reinstate "GFS2: free disk inode which is deleted by remote node -V2" 2023-03-23 19:37:56 +01:00
dir.c gfs2 fixes 2022-08-06 14:44:49 -07:00
dir.h
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 2023-06-01 14:55:43 +02:00
gfs2.h
glock.c gfs2: Cease delete work during unmount 2023-01-31 22:40:24 +01:00
glock.h gfs2: Split the two kinds of glock "delete" work 2023-01-31 22:40:24 +01:00
glops.c gfs2: gfs2_ail_empty_gl no log flush on error 2023-04-25 11:07:16 +02:00
glops.h
incore.h gfs2: Evict inodes cooperatively 2023-01-31 22:40:24 +01:00
inode.c gfs2: Remove ghs[] from gfs2_unlink 2023-03-27 14:42:16 +02:00
inode.h fs: port ->permission() to pass mnt_idmap 2023-01-19 09:24:28 +01:00
Kconfig
lock_dlm.c fs: dlm: remove DLM_LSFL_FS from uapi 2022-08-23 14:54:54 -05:00
log.c - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
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
meta_io.c gfs2: replace obvious uses of b_page with b_folio 2023-01-18 17:12:40 -08:00
meta_io.h gfs2: Use container_of() for gfs2_glock(aspace) 2022-05-24 21:29:14 +02:00
ops_fstype.c gfs2: Use gfs2_holder_initialized for jindex 2023-04-18 14:46:16 +02:00
quota.c gfs2: replace ll_rw_block() 2022-09-11 20:26:06 -07:00
quota.h
recovery.c gfs2: replace 'found' with dedicated list iterator variable 2022-05-14 03:05:55 +02:00
recovery.h
rgrp.c gfs2: Split the two kinds of glock "delete" work 2023-01-31 22:40:24 +01:00
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 2023-05-10 17:15:18 +02:00
super.h gfs2: Don't release and reacquire local statfs bh 2021-08-20 09:03:46 -05:00
sys.c Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
sys.h
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 fs: drop unused posix acl handlers 2023-03-06 09:57:12 +01:00
xattr.h