From: Mark Lord <liml@rtr.ca>
To: Alan <alan@lxorguk.ukuu.org.uk>
Cc: Tejun Heo <htejun@gmail.com>, Ric Wheeler <ric@emc.com>,
Jeff Garzik <jeff@garzik.org>,
linux-ide@vger.kernel.org, Mark Lord <mlord@pobox.com>
Subject: Re: [PATCH] libata: reduce ATA command timeout to 7secs
Date: Sat, 03 Feb 2007 14:50:50 -0500 [thread overview]
Message-ID: <45C4E79A.9060602@rtr.ca> (raw)
In-Reply-To: <20070203195930.4dc956dc@localhost.localdomain>
Alan wrote:
>> So, I agree with Mark here. We should retry and fail bio-by-bio. The
>> end effect wouldn't be much worse than block-by-block while taking much
>> less time.
>
> And perhaps flip the bio list backwards as well 8) ?
Reversing I/O lists might be the thing to do, but it gets really
complex at the low level. Drives don't have commands to read
sectors in reverse order. So to reverse the I/O, each single
command would have to be broken out into possibly thousands
of individual reads..
Not something I'd want to implement, but that's why we have Tejun! ;)
next prev parent reply other threads:[~2007-02-03 19:50 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-02 6:37 [PATCH] libata: reduce ATA command timeout to 7secs Tejun Heo
2007-02-02 10:08 ` Alan
2007-02-02 11:49 ` Tejun Heo
2007-02-02 13:25 ` Ric Wheeler
2007-02-02 15:12 ` Tejun Heo
2007-02-02 15:39 ` Alan
2007-02-02 16:13 ` Mark Lord
2007-02-02 16:43 ` Eric D. Mudama
2007-02-02 18:47 ` Alan
2007-02-02 23:00 ` Eric D. Mudama
2007-02-03 23:34 ` Ric Wheeler
2007-02-03 4:31 ` Tejun Heo
2007-02-03 19:59 ` Alan
2007-02-03 19:50 ` Mark Lord [this message]
2007-02-02 16:12 ` Mark Lord
2007-02-03 4:45 ` Tejun Heo
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