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

From: Hanjun Guo
Date: Tue Sep 27 2016 - 02:26:26 EST

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?