linux-kernel - Re: [PATCH] block: Fix computation of merged request priority

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Message-ID: <x49ioj0e2l5.fsf@segfault.boston.devel.redhat.com>
Date:	Fri, 31 Oct 2014 10:27:50 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Jan Kara <jack@...e.cz>
Cc:	axboe@...nel.dk, LKML <linux-kernel@...r.kernel.org>,
	stable@...r.kernel.org
Subject: Re: [PATCH] block: Fix computation of merged request priority

Jan Kara <jack@...e.cz> writes:

> Priority of a merged request is computed by ioprio_best(). If one of the
> requests has undefined priority (IOPRIO_CLASS_NONE) and another request
> has priority from IOPRIO_CLASS_BE, the function will return the
> undefined priority which is wrong. Fix the function to properly return
> priority of a request with the defined priority.

Reviewed-by: Jeff Moyer <jmoyer@...hat.com>
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