From: Borislav Petkov <bp@alien8.de>
To: Luming Yu <luming.yu@gmail.com>
Cc: Jinhua Wu <wujinhua@linux.alibaba.com>,
the arch/x86 maintainers <x86@kernel.org>,
zelin.deng@linux.alibaba.com, jiayu.ni@linux.alibaba.com,
Andi Kleen <ak@linux.intel.com>, Luming Yu <luming.yu@intel.com>,
fan.du@intel.com, artie.ding@linux.alibaba.com, "Luck,
Tony" <tony.luck@intel.com>, Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
pawan.kumar.gupta@linux.intel.com, "Yu,
Fenghua" <fenghua.yu@intel.com>, "H. Peter Anvin" <hpa@zytor.com>,
ricardo.neri-calderon@linux.intel.com,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH] perf: optimize clear page in Intel specified model with movq instruction
Date: Thu, 9 Sep 2021 12:44:46 +0200 [thread overview]
Message-ID: <YTnlnlY5h/Xom3fn@zn.tnic> (raw)
In-Reply-To: <CAJRGBZyQuQohbf8v3H19zo1mpbvDXrbNVXCJAUpCEmHgmqTYpg@mail.gmail.com>
On Thu, Sep 09, 2021 at 06:34:40PM +0800, Luming Yu wrote:
> do you mean jump label would not be replaced to nop when its key is enabled?
> so we could not use it in certain functions?
> I don't understand exactly what "ain't gonna happen"
It means, you need to use an X86_FEATURE_ bit because I won't accept a
static key.
But do the benchmarks first.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2021-09-09 10:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-09 8:45 [PATCH] perf: optimize clear page in Intel specified model with movq instruction Jinhua Wu
2021-09-09 9:39 ` Borislav Petkov
2021-09-09 10:34 ` Luming Yu
2021-09-09 10:44 ` Borislav Petkov [this message]
2021-09-09 11:18 ` Peter Zijlstra
[not found] ` <bf6fe59d-c760-40d4-8201-4170cd90ffc3.wujinhua@linux.alibaba.com>
2021-09-09 11:07 ` 回复：[PATCH] " Borislav Petkov
2021-09-09 14:51 ` Luming Yu
[not found] ` <1cac1499-6b00-3c18-b64c-a22f269a2706@linux.alibaba.com>
2021-10-16 13:22 ` Borislav Petkov
[not found] ` <7b07f141-12f5-397d-9e45-1d507cacae84@linux.alibaba.com>
2021-10-18 12:43 ` Borislav Petkov
2021-10-18 14:44 ` Luming Yu
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