Subject: Re: [PATCH] block: separate out padding from alignment
From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Tejun Heo <htejun@gmail.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>, tomof@acm.org,
       jens.axboe@oracle.com, efault@gmx.de, akpm@linux-foundation.org,
       linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
       linux-scsi@vger.kernel.org, jgarzik@pobox.com
In-Reply-To: <47CB9654.2000109@gmail.com>
References: <47C8F4FC.1040505@gmail.com>	<20080302235223X.tomof@acm.org>
	 <47CB6508.3040206@gmail.com>
	 <20080303125940T.fujita.tomonori@lab.ntt.co.jp>
	 <47CB79E9.8000505@gmail.com> <47CB95C2.40309@gmail.com>
	 <47CB9654.2000109@gmail.com>
Content-Type: text/plain
Date: Mon, 03 Mar 2008 12:27:07 -0600
Message-Id: <1204568827.3043.33.camel@localhost.localdomain>
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 690
Lines: 19

On Mon, 2008-03-03 at 15:10 +0900, Tejun Heo wrote:
> Block layer alignment was used for two different purposes - memory
> alignment and padding.  This causes problems in lower layers because
> drivers which only require memory alignment ends up with adjusted
> rq->data_len.  Separate out padding such that padding occurs iff
> driver explicitly requests it.

This puts the libsas SMP handler back into a working state again.

Thanks,

James


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/