From: Jens Axboe <axboe@suse.de>
To: Mukul Kotwani <mkotwani@yahoo.com>
Cc: linux-scsi@vger.kernel.org
Subject: Re: Max IO size
Date: Fri, 2 Aug 2002 08:39:25 +0200 [thread overview]
Message-ID: <20020802063925.GF1512@suse.de> (raw)
In-Reply-To: <20020802051712.56283.qmail@web14005.mail.yahoo.com>
On Thu, Aug 01 2002, Mukul Kotwani wrote:
>
> In fact, even with a max_sectors size set to 1, I
> still get a 1k IO doing 512 byte reads with IOmeter!
>
> Can someone please clarify?
The lowest limit you can set is 8 sectors. Anything below that is not
guarenteed to be honored (it depends on the soft block size of the file
system, or 1kb if there is no fs mounted on the device).
--
Jens Axboe
next prev parent reply other threads:[~2002-08-02 6:39 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-01 0:22 Max IO size Mukul Kotwani
2002-08-01 8:45 ` Jens Axboe
2002-08-01 23:54 ` Mukul Kotwani
2002-08-02 5:17 ` Mukul Kotwani
2002-08-02 6:39 ` Jens Axboe [this message]
2002-08-02 6:44 ` Jens Axboe
2002-08-02 6:55 ` Mukul Kotwani
2002-08-02 7:50 ` Performance Mukul Kotwani
2002-08-02 9:16 ` Performance Fabien Salvi
2002-08-02 14:16 ` Performance Craig Tierney
2002-08-02 23:01 ` Performance Mukul Kotwani
2002-08-02 23:06 ` Performance Randy.Dunlap
2002-08-03 8:26 ` Performance Mukul Kotwani
2002-08-03 16:34 ` Performance Randy.Dunlap
2002-08-03 18:16 ` Performance Simon Trimmer
2002-08-03 20:03 ` Performance Mukul Kotwani
2002-08-04 6:27 ` Performance Jeremy Higdon
2002-08-04 7:39 ` Performance Mukul Kotwani
2002-08-04 8:01 ` Performance Jeremy Higdon
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