Re: [PATCH] x86: UV BAU fix for non-consecutive nasids

From: Ingo Molnar
Date: Tue May 10 2011 - 02:27:12 EST



* Cliff Wickman <cpw@xxxxxxx> wrote:

> From: Cliff Wickman <cpw@xxxxxxx>
>
> This is a fix for the SGI Altix-UV Broadcast Assist Unit code, which is
> used for TLB flushing.
>
> This patch allows nasids (numa address space id's) to be non-consecutive, as is
> the case when using nasid striding or in some certain hardware configurations.
> It also provides a table in local memory for each cpu to translate target cpu
> number to target pnode and nasid.

This changelog is missing one or more of the following essential pieces
of information:

- what user-visible problem is the patch solving
- how was the problem triggered, how was the bug found
- what/how many systems are affected
- why should maintainers apply this patch right now

Thanks,

Ingo
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