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b01b2d72da
linux/fs/gfs2
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Andreas Gruenbacher b01b2d72da gfs2: Fix mmap + page fault deadlocks for direct I/O 
Also disable page faults during direct I/O requests and implement a
similar kind of retry logic as in the buffered I/O case.

The retry logic in the direct I/O case differs from the buffered I/O
case in the following way: direct I/O doesn't provide the kinds of
consistency guarantees between concurrent reads and writes that buffered
I/O provides, so once we lose the inode glock while faulting in user
pages, we always resume the operation.  We never need to return a
partial read or write.

This locking problem was originally reported by Jan Kara.  Linus came up
with the idea of disabling page faults.  Many thanks to Al Viro and
Matthew Wilcox for their feedback.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2021-10-25 08:42:14 +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: Don't release and reacquire local statfs bh 2021-08-20 09:03:46 -05:00
aops.h gfs2: mark stuffed_readpage static 2019-07-03 14:45:18 +02:00
bmap.c gfs2: Move the inode glock locking to gfs2_file_buffered_write 2021-10-20 19:33:09 +02:00
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: Clean up gfs2_unstuff_dinode 2021-06-29 10:56:51 +02:00
dir.h gfs2: Delete an unnecessary check before brelse() 2019-09-04 20:22:17 +02:00
export.c gfs2: Minor gfs2_lookup_by_inum cleanup 2020-06-05 20:19:21 +02:00
file.c gfs2: Fix mmap + page fault deadlocks for direct I/O 2021-10-25 08:42:14 +02:00
gfs2.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
glock.c gfs2: Introduce flag for glock holder auto-demotion 2021-10-20 19:33:08 +02:00
glock.h gfs2: Introduce flag for glock holder auto-demotion 2021-10-20 19:33:08 +02:00
glops.c gfs2: Delay withdraw from atomic context 2021-08-20 09:03:46 -05:00
glops.h gfs2: Split up gfs2_meta_sync into inode and rgrp versions 2020-10-29 22:16:46 +01:00
incore.h gfs2: Eliminate ip->i_gh 2021-10-20 19:33:09 +02:00
inode.c gfs2: Switch to may_setattr in gfs2_setattr 2021-08-13 00:41:05 -04:00
inode.h Changes in gfs2: 2021-04-29 10:33:35 -07:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
lock_dlm.c gfs2: Don't call dlm after protocol is unmounted 2021-08-20 09:03:46 -05:00
log.c gfs2: tiny cleanup in gfs2_log_reserve 2021-08-19 12:31:17 -05:00
log.h gfs2: Clean up revokes on normal withdraws 2021-05-20 13:31:37 +02:00
lops.c gfs2: be more verbose replaying invalid rgrp blocks 2021-08-19 12:31:17 -05:00
lops.h gfs2: Clean up revokes on normal withdraws 2021-05-20 13:31:37 +02:00
main.c gfs2: amend SLAB_RECLAIM_ACCOUNT on gfs2 related slab cache 2021-01-22 12:19:17 -05:00
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: don't stop reads while withdraw in progress 2021-08-20 09:03:46 -05:00
meta_io.h gfs2: Turn gfs2_meta_indirect_buffer into gfs2_meta_buffer 2021-04-03 21:38:12 +02:00
ops_fstype.c gfs2: Mark journal inodes as "don't cache" 2021-08-20 09:03:46 -05:00
quota.c gfs2: Clean up gfs2_unstuff_dinode 2021-06-29 10:56:51 +02:00
quota.h gfs2: move privileged user check to gfs2_quota_lock_check 2020-05-08 18:47:58 +02:00
recovery.c gfs2: Fix fall-through warnings for Clang 2021-04-20 22:38:21 +02:00
recovery.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
rgrp.c gfs2: Fix a number of kernel-doc warnings 2021-04-09 22:14:13 +02:00
rgrp.h gfs2: Add local resource group locking 2021-02-17 19:30:28 +01:00
super.c gfs2: nit: gfs2_drop_inode shouldn't return bool 2021-08-20 09:03:46 -05:00
super.h gfs2: Don't release and reacquire local statfs bh 2021-08-20 09:03:46 -05:00
sys.c gfs2: Add new sysfs file for gfs2 status 2021-04-08 15:07:21 +02:00
sys.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
trace_gfs2.h gfs2: Add per-reservation reserved block accounting 2021-02-17 19:30:26 +01:00
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: Mark journal inodes as "don't cache" 2021-08-20 09:03:46 -05:00
util.h gfs2: don't stop reads while withdraw in progress 2021-08-20 09:03:46 -05:00
xattr.c gfs2: Fix a number of kernel-doc warnings 2021-04-09 22:14:13 +02:00
xattr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00