On Sun, Mar 23, 2014 at 8:16 AM, Al Viro <viro@zeniv.linux.org.uk> wrote:
>         Several fixes; first 4 commits are obvious fixes (a couple
> of fdget_pos()-related ones from Eric Biggers, prepend_name() fix, missing
> checks for false negatives from __lookup_mnt() in fs/namei.c), followed
> by 4 commits dealing with the bug found by Max last week - switch of
> mnt_hash to hlist, to avoid the fun with non-terminating __lookup_mnt().
> I'm fairly comfortable with that pile, but whether its second part is OK
> at this point is up to you; it seems to survive everything I'd thrown
> at it, and it's quite straightforward.  If you really feel that it's
> too close to -final, well... alternative variant is to replace the last
> 4 with "if we are spinning too much in __lookup_mnt(), check mount_lock"
> kludge like the one I've posted early in the "don't clobber mnt_hash.next"
> thread.  I'd rather go for "let's just use hlist", obviously...
>
> git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-linus
>
> Shortlog:
> Al Viro (6):
>       make prepend_name() work correctly when called with negative *buflen
>       rcuwalk: recheck mount_lock after mountpoint crossing attempts
>       resizable namespace.c hashes
>       keep shadowed vfsmounts together
>       don't bother with propagate_mnt() unless the target is shared
>       switch mnt_hash to hlist
>
> Eric Biggers (2):
>       vfs: atomic f_pos access in llseek()
>       vfs: Don't let __fdget_pos() get FMODE_PATH files
>
> Diffstat:
>  fs/dcache.c     |    4 +-
>  fs/file.c       |   19 ++----
>  fs/mount.h      |    4 +-
>  fs/namei.c      |   29 ++++-----
>  fs/namespace.c  |  177 ++++++++++++++++++++++++++++++++++++-------------------
>  fs/pnode.c      |   26 ++++----
>  fs/pnode.h      |    4 +-
>  fs/read_write.c |    4 +-
>  8 files changed, 155 insertions(+), 112 deletions(-)
>

Your branch on top of Linux v3.14-rc7-66-g774868c7094d is freezing my
Ubuntu/precise AMD64 (WUBI) system when running LTP.

$ cat /opt/ltp/Version
20140115

Vanilla unmodified Linux v3.14-rc7-66-g774868c7094d is OK here.

Dunno how and with which apps you tested, but please verify on your
own with latest LTP release.

My kernel-config and dmesg are attached.
( I have taken a screenshot of the frozen system if you wanna look at. )

Regards,
- Sedat -