linux-kernel - Re: Re: [PATCH] x86: Accelerate copy

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: <20210413145315.GF16519@zn.tnic>
Date:   Tue, 13 Apr 2021 16:53:15 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Kemeng Shi <shikemeng@...wei.com>
Cc:     tglx@...utronix.de, mingo@...hat.com, x86@...nel.org,
        hpa@...or.com, linux-kernel@...r.kernel.org,
        linux-nvdimm@...ts.01.org
Subject: Re: Re: [PATCH] x86: Accelerate copy_page with non-temporal in X86

On Tue, Apr 13, 2021 at 08:54:55PM +0800, Kemeng Shi wrote:
> Yes. And NT stores should be better for copy_page especially copying a lot
> of pages as only partial memory of copied page will be access recently.

I thought "should be better" too last time when I measured rep; movs vs
NT stores but actual measurements showed no real difference.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette