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Eric Sandeen 04646aebd3 fs: avoid softlockups in s_inodes iterators 
Anything that walks all inodes on sb->s_inodes list without rescheduling
risks softlockups.

Previous efforts were made in 2 functions, see:

c27d82f fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
ac05fbb inode: don't softlockup when evicting inodes

but there hasn't been an audit of all walkers, so do that now.  This
also consistently moves the cond_resched() calls to the bottom of each
loop in cases where it already exists.

One loop remains: remove_dquot_ref(), because I'm not quite sure how
to deal with that one w/o taking the i_lock.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 		2019-12-18 00:03:01 -05:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +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
compat.c fs/quota: use COMPAT_SYSCALL_DEFINE for sys32_quotactl() 2018-04-02 20:15:47 +02:00
dquot.c fs: avoid softlockups in s_inodes iterators 2019-12-18 00:03:01 -05:00
kqid.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netlink.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quota.c quota: check quota type in early stage 2019-10-08 17:26:18 +02:00
quota_tree.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
quota_tree.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quota_v1.c quota: minor code cleanup for v1_format_ops 2019-10-17 10:30:28 +02:00
quota_v2.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
quotaio_v1.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
quotaio_v2.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00