From: Marcelo Penna Guerra <eu@marcelopenna.org>
To: linux-kernel@vger.kernel.org
Subject: SII SATA request size limit
Date: Thu, 11 Sep 2003 23:57:06 -0300 [thread overview]
Message-ID: <200309112357.41592.eu@marcelopenna.org> (raw)
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Hi,
In recent kernels, the siimage driver limits the max kb per request size to 15
(7.5kb). As I was having no problems with rqsize of 128 (64kb), I decided to
comment out this part of the code and my system is rock solid.
I'm not suggesting that it should be removed, as it probably is necessary on
other systems, but as the performance impact is huge (with 15 hdparm tests
show an average 26mb/s and with 128 it's 47mb/s), I think the user should be
warnned of this and there could be a option to set it to 128 in 2.6.x
kernels, so people can try to see if it's stable. I really don't beleive that
I have such an unique hardware configuration, so this should benefit other
people.
Marcelo Penna Guerra
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next reply other threads:[~2003-09-12 2:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-12 2:57 Marcelo Penna Guerra [this message]
2003-09-12 10:41 ` SII SATA request size limit Alan Cox
2003-09-12 17:46 ` Witold Krecicki
2003-09-15 10:12 ` Adam Jones
2003-09-18 11:44 ` Witold Krecicki
2003-09-15 5:57 ` Catalin BOIE
-- strict thread matches above, loose matches on Subject: below --
2003-09-12 20:48 Eduardo Casino
2003-09-15 8:47 ` Jens Axboe
2003-09-12 20:55 Marcelo Penna Guerra
2003-09-13 10:56 ` Witold Krecicki
2003-09-12 21:00 Marcelo Penna Guerra
2003-09-12 22:28 ` Alan Cox
2003-09-12 23:07 Marcelo Penna Guerra
2003-09-12 23:16 ` Alan Cox
2003-09-13 16:43 Marcelo Penna Guerra
2003-09-14 0:57 Eduardo Casino
2003-09-15 15:24 CASINO_E
2003-09-15 15:32 ` Jens Axboe
2003-09-15 16:00 ` Justin Cormack
2003-09-15 16:07 ` Jens Axboe
2003-09-15 22:19 ` Alan Cox
2003-09-15 16:33 CASINO_E
2003-09-18 17:43 Allen Martin
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