From: Chris Mason <chris.mason@oracle.com>
To: Tobias <tracer@robotech.de>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Blocked for more than 120 seconds
Date: Thu, 1 Dec 2011 13:41:58 -0500 [thread overview]
Message-ID: <20111201184158.GB10535@shiny> (raw)
In-Reply-To: <4ED738E5.3080200@robotech.de>
On Thu, Dec 01, 2011 at 09:20:53AM +0100, Tobias wrote:
> Hi Chris
>
> Am 30.11.2011 15:10, schrieb Chris Mason:
> >We see a bunch of procs stuck waiting to start a transaction, but we
> >don't see why they are waiting. Could you please capture a sysrq-t
> >during this? That will show us all the waiters everywhere. We're
> >really looking for the one proc stuck in btrfs_commit_transaction, he's
> >the key to the stalls.
> >
>
> This is my first time working with sysrq... i hope i did it right...
> Here is the logoutput (quite much)
So, the transaction close is in btrfs_evict_inode, which sounds like a
deadlock recently fixed by this commit:
http://git.kernel.org/?p=linux/kernel/git/mason/linux-btrfs.git;a=commit;h=aa38a711a893accf5b5192f3d705a120deaa81e0
If you pull the for-linus branch from today, hopefully the problem will
be gone.
-chris
next prev parent reply other threads:[~2011-12-01 18:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-28 8:16 Blcoked for more than 120 seconds Tobias
2011-11-28 9:29 ` Chris Samuel
2011-11-30 9:44 ` Blocked " Tobias
2011-11-30 14:10 ` Chris Mason
[not found] ` <4ED738E5.3080200@robotech.de>
2011-12-01 18:41 ` Chris Mason [this message]
2011-12-02 13:46 ` Tobias
2011-12-02 14:01 ` Chris Mason
2011-12-04 12:11 ` Konstantinos Skarlatos
2011-12-02 15:22 ` Konstantinos Skarlatos
2011-12-02 15:48 ` Tobias
2011-12-02 19:53 ` Konstantinos Skarlatos
2011-12-03 0:35 ` Konstantinos Skarlatos
2011-12-03 14:36 ` Konstantinos Skarlatos
2011-12-05 13:12 ` Chris Mason
2011-12-25 1:06 ` Konstantinos Skarlatos
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