From: Keith Owens <kaos@sgi.com>
To: Andi Kleen <ak@suse.de>
Cc: linux-arch@vger.kernel.org
Subject: Re: [patch 2.6.17] Avoid broadcasting NMI IPIs
Date: Sat, 24 Jun 2006 18:15:20 +1000 [thread overview]
Message-ID: <23861.1151136920@ocs3.ocs.com.au> (raw)
In-Reply-To: Your message of "Fri, 23 Jun 2006 14:32:56 +0200." <200606231432.56071.ak@suse.de>
Andi Kleen (on Fri, 23 Jun 2006 14:32:56 +0200) wrote:
>On Friday 23 June 2006 06:32, Keith Owens wrote:
>> On some i386/x86_64 systems, sending an NMI IPI as a broadcast will
>> reset the system. This seems to be a BIOS bug which affects machines
>> where one or more cpus are not under OS control. It occurs on HT
>> systems with a version of the OS that is not compiled without HT
>> support. It also occurs when a system is booted with max_cpus=n where
>> 2 <= n < cpus known to the BIOS. The fix is to always send NMI IPI as
>> a mask instead of as a broadcast.
>
>Merged thanks.
>
>P.S.: Linux-arch isn't really the right list to cc x86 patches too.
>I'm sure the other arch maintainers couldn't care less about such x86isms.
These two patches were for both i386 and x86_64, not just for x86_64.
next prev parent reply other threads:[~2006-06-24 8:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-23 4:32 [patch 2.6.17] Avoid broadcasting NMI IPIs Keith Owens
2006-06-23 12:32 ` Andi Kleen
2006-06-24 8:15 ` Keith Owens [this message]
2006-06-24 8:36 ` Andi Kleen
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