From: Keith Owens <kaos@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: Re: Sending cpu 0 back to SAL slave loop
Date: Sun, 08 Oct 2006 07:37:04 +0000 [thread overview]
Message-ID: <8352.1160293024@ocs3.ocs.com.au> (raw)
In-Reply-To: <20061006203909.GA6500@sgi.com>
Matthew Wilcox (on Fri, 6 Oct 2006 14:44:43 -0600) wrote:
>On Fri, Oct 06, 2006 at 03:39:10PM -0500, Jack Steiner wrote:
>> For kexec, it is ESSENTIAL that all cpus except for the one doing
>> the kexec be returned to the SAL slave loop. If this is not done, our
>> chipset will misdirect IO interrupts on the newly exec'ed kernel.
>
>Could you do an IPI call to have CPU 0 do the kexec and have the CPU
>that sent the IPI fall into the SAL slave loop instead?
An IPI call will not work for MCA or INIT. Both of those drive all
cpus into a state which has disabled interrupts.
next prev parent reply other threads:[~2006-10-08 7:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-06 20:39 Sending cpu 0 back to SAL slave loop Jack Steiner
2006-10-06 20:44 ` Matthew Wilcox
2006-10-07 2:16 ` Jack Steiner
2006-10-08 5:40 ` Zou, Nanhai
2006-10-08 7:37 ` Keith Owens [this message]
2006-10-09 15:09 ` Jack Steiner
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