linux-kernel - Re: linux-next: Tree for January 15 (Call Trace in fs/dcache.c + autofs4)

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Message-ID: <AANLkTinPs5toSudLXuu3=a0RoGHUqYvF8YyhdrXgckXY@mail.gmail.com>
Date:	Sat, 15 Jan 2011 12:00:54 +0100
From:	Sedat Dilek <sedat.dilek@...glemail.com>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: linux-next: Tree for January 15 (Call Trace in fs/dcache.c + autofs4)

On Sat, Jan 15, 2011 at 10:07 AM, Al Viro <viro@...iv.linux.org.uk> wrote:
> On Sat, Jan 15, 2011 at 07:57:23AM +0000, Al Viro wrote:
>> On Sat, Jan 15, 2011 at 08:46:20AM +0100, Sedat Dilek wrote:
>>
>> > Will try the patch from [1] as there was no feedback yet.
>> >
>> > - Sedat -
>> >
>> > [1] https://lkml.org/lkml/2011/1/12/394
>>
>> There's also vfsmount refcounting breakage somewhere in automount series,
>> unfortunately caught only when redoing said refcounting on top of it [1] ;-/
>> I'm bisecting it right now, will post when it's done.
>>
>> [1] with mnt{get,put}_long() variant the breakage is present, but not
>> immediately noticable.  With (local) rewrite to saner rules it became
>> visible, but I spent quite a while trying to find the bug in the most
>> obvious place - i.e. that rewrite.
>
> Argh...  In __do_follow_link() replace
>
>        if (link->mnt != nd->path.mnt)
> with
>        if (link->mnt == nd->path.mnt)
>
> Mismerge yesterday ;-/  I've pushed fix for that in for-next, will fold
> shortly.  As for autofs4 breakage, I've a preliminary fix, testing it
> now.
>

Hey, cool and thanks.

Not sure if you catched them all, I have noticed on my latest
("buggy") linux-next kernel these Call Traces when doing an
update-grub.

- Sedat -

View attachment "call-traces_update-grub.txt" of type "text/plain" (29009 bytes)