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Date: Tue, 30 Oct 2007 21:50:24 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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References: <20070917194009.W84177@woozle.rinet.ru>	<200709171912.09060.qpadla@gmail.com>	<46EEA89F.3060606@delphij.net>	<200709241223.52140.qpadla@gmail.com>
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Cc: MingyanGuo <guomingyan@gmail.com>, current@freebsd.org,
	Dmitry Morozovsky <marck@rinet.ru>, freebsd-current@freebsd.org,
	delphij@freebsd.org, Howard Su <howard0su@gmail.com>
Subject: Re: tmpfs on contemporary -current: panic: locked against myself
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LI Xin wrote:
> Nikolay Pavlov wrote:
>> On Monday 17 September 2007 19:17:35 LI Xin wrote:
>>> Nikolay Pavlov wrote:
>>> [...]
>>>
>>>> Yes it's still need more fixes. I have send a mail to delphij
>>>> regarding this one panic:
>>>> http://docs.freebsd.org/cgi/mid.cgi?200708201848.22157.qpadla
>>>> But with out any response. May be he is busy :(
>>> Sorry I am aware of the issue and am busy for $REALJOB these days.  I
>>> have cc'ed howardsu@ and mingyanguo@ to see if they have some
>>> suggestions.  The problem seems to be a race condition caused by
>>> incorrect VFS related locking, but diagnosing it is relatively hard.
>>>
>>> I'll try to pick up with the development in early October.  Before that
>>> I can only do some small scale bugfixes rather than investing more time
>>> into tmpfs stuff... :-(
>>>
>>> Cheers,
>> Just want to be sure that no one lose this. Here is a PR:
>> http://www.freebsd.org/cgi/query-pr.cgi?pr=116600
> 
> Can not reproduce here.  Could you please confirm that this still
> persists for latest RELENG_7?
> 
> Cheers,

I don't know about that one, but I am able to get this panic still after 
a few seconds of load:

panic: Assertion IMPLIES(dnode->tn_type == VDIR && 
dnode->tn_dir.tn_parent == dnode, !(cnp->cn_flags & ISDOTDOT)) failed at 
../../../fs/tmpfs/tmpfs_vnops.c:97

If you can fix that I can look for the other one :)

Kris