Andrew Morton <[email protected]> writes:
> On Wed, 21 Feb 2007 14:31:41 -0500
> Chuck Ebbert <[email protected]> wrote:
>> What is the status of:
>>
>>
> http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20/2.6.20-mm2/broken-out/x86_64-mm-simplfy-__assign_irq_vector.patch
>>
> http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20/2.6.20-mm2/broken-out/x86_64-mm-handle-irqs-pending-in-irr-during-irq-migration.patch
>
> That's mainly an Andi decision. Let's cc him.
>
>> They fix a serious bug that causes machines to freeze up
>> or just run very slowly.
>>
>> I'd like to see these in -stable if possible.
>
> They're not even in mainline yet.
If you don't have it you at least want the patch below. It generally
makes the bug non-fatal.
I'm still working my way through possible fixes... Although the
patch in question is close, and normally fixes it in my utmost
paranoia I can still find problems with it.
Eric
commit 2fb12a9bca5ad9aa6dcd2c639b4a7656a8843ef8
Author: Eric W. Biederman <[email protected]>
Date: Tue Feb 13 13:26:25 2007 +0100
[PATCH] x86-64: survive having no irq mapping for a vector
Occasionally the kernel has bugs that result in no irq being found for a
given cpu vector. If we acknowledge the irq the system has a good chance
of continuing even though we dropped an irq message. If we continue to
simply print a message and not acknowledge the irq the system is likely to
become non-responsive shortly there after.
AK: Fixed compilation for UP kernels
Signed-off-by: Eric W. Biederman <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
Cc: "Luigi Genoni" <[email protected]>
Cc: Andi Kleen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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