linux-kernel - Re: [PATCH] block/aio: Enable sysfs nomerge control for I/O requests in the plug list

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Message-ID: <x49txg8x9ro.fsf@segfault.boston.devel.redhat.com>
Date:	Wed, 23 Oct 2013 11:54:51 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Alireza Haghdoost <alireza@...umn.edu>
Cc:	Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org,
	Jerry Fredin <jerry.fredin@...app.com>, linux-aio@...ck.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] block/aio: Enable sysfs nomerge control for I/O requests in the plug list

Alireza Haghdoost <alireza@...umn.edu> writes:

> This patch enables the sysfs to control I/O request merge
> functionality in the plug list. While this control has been
> implemented for the request queue, it was dismissed in the plug list.
> Therefore, block layer merges requests together (or attempt to merge)
> even if the merge capability was disable using sysfs nomerge parameter
> value 2.

Yeah, this looks like an oversight.  Your mailer really munged up the
patch, though.  You should fix that and resend (unless Jens just fixes
it up manually).  Also, please specify the -p option to diff or just use
git diff.

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