Re: [PATCH] arm64, numa: Add cpu_to_node() implementation.

From	Robert Richter <rric@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH] arm64, numa: Add cpu_to_node() implementation.
Date	2016-10-06 11:20 +0200
Message-ID	<spd0m-6Av-5@gated-at.bofh.it> (permalink)
References	<sjbNE-Bs-13@gated-at.bofh.it> <sjqMF-1Q1-1@gated-at.bofh.it> <sjrz3-2lw-1@gated-at.bofh.it> <sjthv-3tR-7@gated-at.bofh.it> <slU3U-64K-1@gated-at.bofh.it>
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On 27.09.16 14:26:08, Hanjun Guo wrote:
> On 09/20/2016 09:21 PM, Robert Richter wrote:
> >On 20.09.16 19:32:34, Hanjun Guo wrote:
> >>On 09/20/2016 06:43 PM, Robert Richter wrote:
> >
> >>>Unfortunately either your nor my code does fix the BUG_ON() I see with
> >>>the numa kernel:
> >>>
> >>>  kernel BUG at mm/page_alloc.c:1848!
> >>>
> >>>See below for the core dump. It looks like this happens due to moving
> >>>a mem block where first and last page are mapped to different numa
> >>>nodes, thus, triggering the BUG_ON().
> >>
> >>Didn't triggered it on our NUMA hardware, could you provide your
> >>config then we can have a try?
> >
> >Config attached. Other configs with an initrd fail too.
> 
> hmm, we can't reproduce it on our hardware, do we need
> to run some specific stress test on it?

No, it depends on the efi memory zones marked reserved. See my other
thread on this where I have attached mem ranges from the log. I have a
fix available already.

Thanks,

-Robert

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Re: [PATCH] arm64, numa: Add cpu_to_node() implementation. Hanjun Guo <hanjun.guo@linaro.org> - 2016-09-27 08:30 +0200
  Re: [PATCH] arm64, numa: Add cpu_to_node() implementation. Robert Richter <rric@kernel.org> - 2016-10-06 11:20 +0200

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