From: Theodore Ts'o <tytso@mit.edu>
To: Mike Galbraith <bitbucket@online.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>,
tglx@linutronix.de
Subject: Re: [PATCH RT] fs: jbd2: pull your plug when waiting for space
Date: Mon, 10 Mar 2014 13:47:18 -0400 [thread overview]
Message-ID: <20140310174718.GB6763@thunk.org> (raw)
In-Reply-To: <1392990852.5451.178.camel@marge.simpson.net>
On Fri, Feb 21, 2014 at 02:54:12PM +0100, Mike Galbraith wrote:
>
> ext3: dbench1 queues a buffer, blocks on journal mutex, it's plug is not
> pulled. dbench2 mutex owner is waiting for kjournald, who is waiting for
> the buffer queued by dbench1. Game over.
Where is in ext3/4 are we calling some function which could end up
blocking on kjournald while we have the I/O queue plugged? That
sounds suspicious and potentially wrong.
- Ted
next prev parent reply other threads:[~2014-03-10 17:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-21 12:32 [PATCH RT] fs: jbd2: pull your plug when waiting for space Sebastian Andrzej Siewior
2014-02-21 13:54 ` Mike Galbraith
2014-03-10 17:47 ` Theodore Ts'o [this message]
2014-03-11 4:13 ` Mike Galbraith
2014-03-10 17:26 ` Steven Rostedt
2014-03-10 17:41 ` Sebastian Andrzej Siewior
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