From: Samuel Tardieu <sam@rfc1149.net>
To: linux-raid@vger.kernel.org
Subject: Re: Implementing low level timeouts within MD
Date: Sat, 27 Oct 2007 12:33:57 +0200 [thread overview]
Message-ID: <87tzoc7soa.fsf@willow.rfc1149.net> (raw)
In-Reply-To: 1193425254.10336.290.camel@firewall.xsintricity.com
>>>>> "Doug" == Doug Ledford <dledford@redhat.com> writes:
Doug> This isn't an md problem, this is a low level disk driver
Doug> problem. Yell at the author of the disk driver in question. If
Doug> that driver doesn't time things out and return errors up the
Doug> stack in a reasonable time, then it's broken. Md should not,
Doug> and realistically can not, take the place of a properly written
Doug> low level driver.
I agree with Doug: nothing prevents you from using md above very slow
drivers (such as remote disks or even a filesystem implemented over a
tape device to make it extreme). Only the low-level drivers know when
it is appropriate to timeout or fail.
Sam
--
Samuel Tardieu -- sam@rfc1149.net -- http://www.rfc1149.net/
next prev parent reply other threads:[~2007-10-27 10:33 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-26 17:12 Implementing low level timeouts within MD Alberto Alonso
2007-10-26 19:00 ` Doug Ledford
2007-10-27 10:33 ` Samuel Tardieu [this message]
2007-10-30 5:19 ` Alberto Alonso
2007-10-30 17:39 ` Doug Ledford
2007-11-01 5:08 ` Alberto Alonso
2007-11-01 14:14 ` Bill Davidsen
2007-11-01 19:16 ` Doug Ledford
2007-11-02 8:41 ` Alberto Alonso
2007-11-02 11:09 ` David Greaves
2007-11-02 17:47 ` Alberto Alonso
2007-11-02 12:44 ` Bill Davidsen
2007-11-02 15:45 ` Doug Ledford
2007-11-02 18:21 ` Alberto Alonso
2007-11-02 19:15 ` Doug Ledford
2007-11-02 21:24 ` Alberto Alonso
2007-10-27 21:46 ` Alberto Alonso
2007-10-27 23:55 ` Doug Ledford
2007-10-28 6:27 ` Alberto Alonso
2007-10-29 17:22 ` Doug Ledford
2007-10-30 5:08 ` Alberto Alonso
2007-10-30 12:12 ` Gabor Gombas
2007-10-30 17:58 ` Doug Ledford
2007-11-01 14:19 ` Bill Davidsen
2007-11-07 8:47 ` Goswin von Brederlow
2007-10-27 18:59 ` Richard Scobie
[not found] ` <1193522726.7690.31.camel@w100>
2007-10-27 23:46 ` Richard Scobie
2007-10-30 4:47 ` Neil Brown
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