linux-kernel - Re: [PATCH v2 4/4] selftests: vm: add KSM merging across nodes test

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Date:   Tue, 3 Aug 2021 22:01:20 -0400
From:   Pavel Tatashin <pasha.tatashin@...een.com>
To:     Zhansaya Bagdauletkyzy <zhansayabagdaulet@...il.com>
Cc:     shuah@...nel.org, Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-kselftest@...r.kernel.org, linux-mm <linux-mm@...ck.org>,
        Tyler Hicks <tyhicks@...ux.microsoft.com>
Subject: Re: [PATCH v2 4/4] selftests: vm: add KSM merging across nodes test

On Wed, Jul 14, 2021 at 4:56 AM Zhansaya Bagdauletkyzy
<zhansayabagdaulet@...il.com> wrote:
>
> Add check_ksm_numa_merge() function  to test that pages in different NUMA
> nodes are being handled properly. First, two duplicate pages are allocated
> in two separate NUMA nodes using the libnuma library. Since there is one
> unique page in each node, with merge_across_nodes = 0, there won't be any
> shared pages. If merge_across_nodes is set to 1, the pages will be
> treated as usual duplicate pages and will be merged. If NUMA config is
> not enabled or the number of NUMA nodes is less than two, then the test
> is skipped. The test is run as follows: ./ksm_tests -N
>
> Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@...il.com>

Reviewed-by: Pavel Tatashin <pasha.tatashin@...een.com>