linux-kernel - Re: [PATCH] use x86 cpu park to speedup smp

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: <87v9d2rrdq.fsf@nanos.tec.linutronix.de>
Date:   Wed, 16 Dec 2020 11:12:49 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     "shenkai \(D\)" <shenkai8@...wei.com>,
        Andy Lutomirski <luto@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        hewenliang4@...wei.com, hushiyuan@...wei.com,
        luolongjun@...wei.com, hejingxian@...wei.com
Subject: Re: [PATCH] use x86 cpu park to speedup smp_init in kexec situation

Kai,

On Wed, Dec 16 2020 at 16:45, shenkai wrote:
> 在 2020/12/16 5:20, Thomas Gleixner 写道:
>>
>>
> Thanks for your and Andy's precious comments. I would like to take a try on
>
> reconstructing this patch to make it more decent and generic.

>> It would be interesting to see the numbers just with play_dead() using
>> hlt() or mwait(eax=0, 0) for the kexec case and no other change at all.

Can you please as a first step look into this and check if the time
changes?

Thanks,

        tglx