linux-kernel - Re: kexec and aacraid broken

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Message-ID: <86802c440705301419g2ed59773vda15c3d2a9e90479@mail.gmail.com>
Date:	Wed, 30 May 2007 14:19:49 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Salyzyn, Mark" <mark_salyzyn@...ptec.com>
Cc:	vgoyal@...ibm.com, "Andrew Morton" <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	linux-scsi@...r.kernel.org,
	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>
Subject: Re: kexec and aacraid broken

On 5/30/07, Salyzyn, Mark <mark_salyzyn@...ptec.com> wrote:
> Vivek Goyal [mailto:vgoyal@...ibm.com] writes:
> > So most likely if we start disabling the interrupts
> > in .shutdown routine we might skip resetting adapter
> > on every kexec without any side affects?
>
> Not that simple. The .shutdown would need to perform more resource
> cleanups of the .remove call to prevent side effects. I need to move
> some of the .remove activity into the .shutdown handler to make sure the
> adapter is quiesced.
>
> I will hold off on submitting any of these changes until they are
> evaluated and tested; I am waiting for feedback from Yinghai on the
> other mitigations that I feel are closer to the root cause.
>
1. [SCSI] aacraid: superfluous adapter reset for IBM 8 series
ServeRAID controllers
2. [SCSI] aacraid: kexec fix (reset interrupt handler)
3. aacraid_commit_reset.patch
4. [PATCH] aacraid: fix shutdown handler to also disable interrupts

the kernel with this patch -4  and even without 1, 2, 3

can load other kernel with or without patch 1,2,3

YH
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