From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Hi Greg-KH, Al, & Co,
So I've recently been repeatedly hitting the same dcache shrink list
corruption bug on v3.14.47 that has been addressed in >= v3.15 code,
but it appears only one of the fixes:
commit 22213318af7ae265bc6cd8aef2febbc2d69a2440
Author: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Date: Sat Apr 19 12:30:58 2014 -0400
fix races between __d_instantiate() and checks of dentry flags
actually made it into v3.14.y code.
The final set of patches from Al, along with the original thread is here:
https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg637332.html
The series cherry-picked clean into v3.14.y, with the minor exception
of needing to use the older dentry->d_child in __dentry_kill(), instead
of the newer dentry->d_u.d_child present in >= v3.15.y.
If there are no objections and/or concerns from Al, please consider
queueing this series to address the bug for other folks still using
v3.14.y code.
Thank you,
--nab
Al Viro (7):
fold d_kill() and d_free()
fold try_prune_one_dentry()
new helper: dentry_free()
expand the call of dentry_lru_del() in dentry_kill()
dentry_kill(): don't try to remove from shrink list
don't remove from shrink list in select_collect()
more graceful recovery in umount_collect()
Miklos Szeredi (1):
dcache: don't need rcu in shrink_dentry_list()
fs/dcache.c | 316 ++++++++++++++++---------------------------------
include/linux/dcache.h | 2 +
2 files changed, 103 insertions(+), 215 deletions(-)
--
1.8.5.3
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