linux-kernel - Re: [PATCH v2 2/4] selftests: vm: add KSM unmerge test

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Message-ID: <CA+CK2bBCeB=4mOX_UZd3ViWCpFGhv+Cz1Yk8UWO987KFg1h3cQ@mail.gmail.com>
Date:   Tue, 3 Aug 2021 21:58:00 -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 2/4] selftests: vm: add KSM unmerge test

On Wed, Jul 14, 2021 at 4:56 AM Zhansaya Bagdauletkyzy
<zhansayabagdaulet@...il.com> wrote:
>
> Add check_ksm_unmerge() function to verify that KSM is properly
> unmerging shared pages. For this, two duplicate pages are merged first
> and then their contents are modified. Since they are not identical
> anymore, the pages must be unmerged and the number of merged pages has
> to be 0. The test is run as follows: ./ksm_tests -U
>
> Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@...il.com>

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