Re: dcache shrink list corruption?

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On Tue, May 06, 2014 at 10:01:21AM -0700, Linus Torvalds wrote:
> On Tue, May 6, 2014 at 9:52 AM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
> >
> > OK...  There's one more thing I would like to put there, if you are going to
> > be away for the week.  It has sat in -next for a while, and it could stay
> > there, except that there's a _lot_ of followups touching stuff all over the
> > tree and I'd obviously prefer those to go into subsystem trees.  Which
> > means inter-tree dependencies ;-/  Would you be OK if I included that one
> > into pull request?  It just turns kvfree() into inline and takes it to
> > mm.h, next to is_vmalloc_addr();
> 
> Is there any particular reason for inlining this? I'd actually rather
> not, _especially_ if it means that a lot of "is_vmalloc_addr()" usage
> goes away and we may end up with this as a real interface.

OK, I can live with that.  dcache fixes + kvfree() (uninlined, exported by
mm/util.c) + posix_acl bugfix from hch.  Please, pull from
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-linus

Shortlog:
Al Viro (9):
      fix races between __d_instantiate() and checks of dentry flags
      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()
      nick kvfree() from apparmor

Christoph Hellwig (1):
      posix_acl: handle NULL ACL in posix_acl_equiv_mode

Miklos Szeredi (1):
      dcache: don't need rcu in shrink_dentry_list()

Diffstat:
 fs/dcache.c                          |  318 ++++++++++++++++++++++++---------------------------------------------------
 fs/namei.c                           |    6 +-
 fs/posix_acl.c                       |    6 ++
 include/linux/dcache.h               |    2 +
 include/linux/mm.h                   |    2 +
 mm/util.c                            |   10 +++
 security/apparmor/include/apparmor.h |    1 -
 security/apparmor/lib.c              |   14 ----
 8 files changed, 125 insertions(+), 234 deletions(-)

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