linux-kernel - Re: [PATCH] psi: Treat ksm swapping in copy as memstall

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <YegK7+oKFG8EPRp9@cmpxchg.org>
Date:   Wed, 19 Jan 2022 07:58:23 -0500
From:   Johannes Weiner <hannes@...xchg.org>
To:     CGEL <cgel.zte@...il.com>
Cc:     akpm@...ux-foundation.org, sfr@...b.auug.org.au,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Yang Yang <yang.yang29@....com.cn>
Subject: Re: [PATCH] psi: Treat ksm swapping in copy as memstall

On Wed, Jan 19, 2022 at 06:13:54AM +0000, CGEL wrote:
> I did a test, when we use zram, it takes longer time for ksm copying than
> swap_readpage(). Ksm copying average takes 147263ns, swap_readpage()
> average takes 55639ns. So I think this patch is reasonable.

Ok, that sounds reasonable to me as well. Please add the
PageWorkingset() check and resubmit the patch. Thanks!