linux-kernel - Re: how to limit number of sectors each time

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Message-ID: <20081016054400.GN19428@kernel.dk>
Date:	Thu, 16 Oct 2008 07:44:01 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	gshan <gshan@...atel-lucent.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: how to limit number of sectors each time

On Thu, Oct 16 2008, gshan wrote:
> Hi All,
> 
> I want to limit requested sectors each time in function 
> drivers/ide/ide-disk.c::__ide_do_rw_disk. The requested
> sectors were defined in rq->nr_sectors. So how to limit or decrease 
> nr_sectors for data transfer each time?

Set max_sectors_kb in sysfs for that device or q->max_sectors
internally.

-- 
Jens Axboe

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