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From: Edward Shishkin <edward@namesys.com>
To: Zan Lynx <zlynx@acm.org>
Cc: Linux kernel mailing list <linux-kernel@vger.kernel.org>,
	ReiserFS List <reiserfs-list@namesys.com>
Subject: Re: linux-2.6.20-rc4-mm1 Reiser4 filesystem freeze and corruption
Date: Fri, 19 Jan 2007 21:53:33 +0300	[thread overview]
Message-ID: <45B113AD.5040706@namesys.com> (raw)
In-Reply-To: <1169229490.6266.11.camel@oberon>

Zan Lynx wrote:

>I have been running 2.6.20-rc2-mm1 without problems, but both rc3-mm1
>and rc4-mm1 have been giving me these freezes. 
>

I didn't investigate it in details yet, other file systems also freeze 
for me:
http://marc.theaimsgroup.com/?l=linux-kernel&m=116809282829254&w=2

> They were happening
>inside X and without external console it was impossible to get anything,
>plus I was reluctant to test it since the freeze sometimes requires a
>full fsck.reiser4 --build-fs to recover the filesystem.
>  
>

Why did you decide to recover? Got oops after mount, or?

>But I finally got some output in a console session.  I wasn't able to
>get it all, I made some notes of what I think the problem is.  I may try
>again later once I get netconsole working (netconsole fails as a
>built-in, I'll try it as a module next).
>
>1 lock held by pdflush/185:
>#0: (&type->s_umount_key#15) ... writeback_inodes+0x89
>
>3 locks held by realsync/12942:
>#0: (&type->s_umount_key#15) at ... __sync_inodes+0x78
>#1: (&mgr->commit_mutex) ... reiser4_txn_end+0x37a
>#2: (&qp->mutex) ... synchronize_qrcu+0x19
>
>So, I *think* the problem is two locks on s_umount_key#15.  Does that
>sound likely?  I also noticed QRCU may be involved.
>
>Perhaps someone will look at this and instantly know what the problem
>is.
>
>If not, I'll be following up with more details like .config and perhaps
>a full sysrq-T dump as soon as that fsck finishes.
>  
>


  reply	other threads:[~2007-01-19 19:53 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-19 17:58 Zan Lynx
2007-01-19 18:53 ` Edward Shishkin [this message]
2007-01-20  0:34 ` Vladimir V. Saveliev
     [not found]   ` <1170267238.22971.1.camel@oberon>
2007-02-01 15:54     ` Edward Shishkin
2007-02-02  0:21       ` Zan Lynx
2007-01-23  7:38 ` Vince
2007-01-23 19:15   ` Vladimir V. Saveliev
2007-01-25  7:33     ` Vince

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