From: Mark Lord <liml@rtr.ca>
To: Artem Bokhan <aptem@ngs.ru>
Cc: linux-ide@vger.kernel.org
Subject: Re: [PATCH #upstream-fixes] sata_mv: don't issue two DMA commands concurrently
Date: Fri, 15 Aug 2008 08:27:27 -0400 [thread overview]
Message-ID: <48A5762F.7000502@rtr.ca> (raw)
In-Reply-To: <48A5159E.2010508@ngs.ru>
Artem Bokhan wrote:
> It uses ncq. Thanks, Mark.
..
Okay, so the ATA specs explicitly require a reset there.
Not much to do about that.
If you were super-keen, though, you could crawl through libata
and try reducing various delays and polling intervals that are
associated with a hard reset for that specific (ahci?) driver
and the core libata routines.
Might shave that 0.75sec down to perhaps 100ms or so.
But again, the optimal numbers in your specific case
will not work for the general case. It might be possible
to parameterize it all, though, permitting different
values for differing hardware.
Cheers
next prev parent reply other threads:[~2008-08-15 12:27 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-08 10:02 bad sectors, suspicious behaviour Artem Bokhan
2008-08-08 13:34 ` Mark Lord
2008-08-08 13:50 ` Mark Lord
2008-08-08 14:14 ` Mark Lord
2008-08-11 11:12 ` Bokhan Artem
2008-08-13 8:40 ` Tejun Heo
2008-08-13 10:47 ` Artem Bokhan
2008-08-13 10:50 ` Tejun Heo
2008-08-13 11:19 ` Artem Bokhan
2008-08-13 11:24 ` [PATCH #upstream-fixes] sata_mv: don't issue two DMA commands concurrently Tejun Heo
2008-08-13 11:37 ` Artem Bokhan
2008-08-13 11:52 ` Tejun Heo
2008-08-13 12:05 ` Artem Bokhan
2008-08-13 12:21 ` Tejun Heo
2008-08-13 12:32 ` Artem Bokhan
2008-08-13 16:17 ` Mark Lord
2008-08-13 17:37 ` Bokhan Artem
2008-08-13 19:58 ` Bokhan Artem
2008-08-13 23:36 ` Mark Lord
2008-08-14 7:42 ` Artem Bokhan
2008-08-14 12:40 ` Mark Lord
2008-08-14 12:58 ` Artem Bokhan
2008-08-14 13:17 ` Artem Bokhan
2008-08-14 19:49 ` Mark Lord
2008-08-15 5:35 ` Artem Bokhan
2008-08-15 12:27 ` Mark Lord [this message]
2008-08-13 16:57 ` Greg Freemyer
2008-08-13 17:29 ` Bokhan Artem
2008-08-13 17:50 ` Greg Freemyer
2008-08-13 18:04 ` Bokhan Artem
2008-08-13 18:13 ` Greg Freemyer
2008-08-13 11:47 ` Artem Bokhan
2008-08-13 11:52 ` Tejun Heo
2008-08-22 16:28 ` Grant Grundler
2008-08-13 16:10 ` Mark Lord
2008-08-22 6:11 ` Jeff Garzik
2008-08-22 17:01 ` Martin Michlmayr
2008-08-26 13:54 ` Mark Lord
2008-08-29 7:12 ` Martin Michlmayr
2008-08-26 1:24 ` Gwendal Grignou
2008-08-26 7:04 ` Tejun Heo
2008-08-26 13:58 ` Mark Lord
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