linux-kernel - Re: [PATCH v2 3/4] selftests: vm: add KSM zero page merging test

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Message-ID: <CA+CK2bCwuDG+LRU_im-N=iZzomNntmreABjg3K5hFFB9o8LgKA@mail.gmail.com>
Date:   Tue, 3 Aug 2021 21:59:30 -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 3/4] selftests: vm: add KSM zero page merging test

On Wed, Jul 14, 2021 at 4:56 AM Zhansaya Bagdauletkyzy
<zhansayabagdaulet@...il.com> wrote:
>
> Add check_ksm_zero_page_merge() function to test that empty pages are
> being handled properly. For this, several zero pages are allocated and
> merged using madvise. If use_zero_pages is enabled, the pages must be
> shared with the special kernel zero pages; otherwise, they  are merged
> as usual duplicate pages. The test is run as follows: ./ksm_tests -Z
>
> Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@...il.com>

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