linux-kernel - Re: [v3.19-rc1] read_events => aio_read_events => WARNING: "do not call blocking ops when !TASK

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Message-ID: <20141224144406.GF17185@kvack.org>
Date:	Wed, 24 Dec 2014 09:44:06 -0500
From:	Benjamin LaHaise <bcrl@...ck.org>
To:	Fam Zheng <famz@...hat.com>
Cc:	Bjørn Mork <bjorn@...k.no>, linux-aio@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [v3.19-rc1] read_events => aio_read_events => WARNING: "do not call blocking ops when !TASK_RUNNING"

On Wed, Dec 24, 2014 at 02:50:02PM +0800, Fam Zheng wrote:
> Could you trace down to the source code context of this io_getevents call in
> mysqld?  The change merely made io_getevents return a lot more quickly than
> before, so it seems like that a polling loop is spinning too fast as a result.

This warning is unrelated to your changes -- see my email exchange with Chris 
Mason for the details.

		-ben
-- 
"Thought is the essence of where you are now."
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