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Date:	Thu, 24 May 2012 11:08:58 +0800
From:	ethan zhao <>
To:	David Rientjes <>
Cc:, Kurt Garloff <>,
	Len Brown <>
Subject: Re: ACPI and NUMA guys, please help to check if this patch is OK

    What we can do to help improving Linux OS is only about fatal
error ? Can I do something to give more clear warning information and
easy to find the root cause ?


On Wed, May 23, 2012 at 11:30 AM, David Rientjes <> wrote:
> On Wed, 23 May 2012, ethan zhao wrote:
>> [PATCH] drivers/acpi/numa.c: Add localities checking code against
>> proximity domains to slit_valid()
>>  Some buggy BIOS/ACPI will set different number to SLIT localities and
>> SRAT proximity domains,
>>  That will make NUMA configuration invalid and kernel will output
>> information like following
>> NUMA:Warning:invalid distance parameter, from=-1 to=-1 distance=83
>> This patch adds some checking code to slit_valid() function in order
>> to check theSLIT localities
>> count against SRAT proximity domains number and give clear information
>> about ACPI bug.
>> Signed-off-by: ethan.zhao <>
> There's nothing in the ACPI spec that prohibits this and the result is
> non-fatal (it only emits a warning of the mismatch), so this patch is
> unnecessary.
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