linux-kernel - Re: [PATCH 4/8] cfq-iosched: minor cleanups

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Message-ID: <x49ioayhvq2.fsf@segfault.boston.devel.redhat.com>
Date:	Mon, 08 Jun 2015 14:59:49 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	axboe@...nel.dk, linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org, vgoyal@...hat.com,
	avanzini.arianna@...il.com
Subject: Re: [PATCH 4/8] cfq-iosched: minor cleanups

Tejun Heo <tj@...nel.org> writes:

> * Some were accessing cic->cfqq[] directly.  Always use cic_to_cfqq()
>   and cic_set_cfqq().
>
> * check_ioprio_changed() doesn't need to verify cfq_get_queue()'s
>   return for NULL.  It's always non-NULL.  Simplify accordingly.
>
> This patch doesn't cause any functional changes.
>
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Cc: Vivek Goyal <vgoyal@...hat.com>
> Cc: Arianna Avanzini <avanzini.arianna@...il.com>

Looks good.  I don't much like the "bool is_sync" function parameters.
Calls to cic_to_cfqq, cic_set_cfqq, etc would be much easier to read if
they took BLK_RW_SYNC and BLK_RW_ASYNC.  Certainly not a problem with
this patch, though, just a general observation.

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