linux-kernel - Re: [PATCH][RFC] x86,lib: Add wbinvd_on_many

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Date: Tue, 9 Apr 2024 09:45:37 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Li RongQing <lirongqing@...du.com>
Cc: tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
	dave.hansen@...ux.intel.com, x86@...nel.org, peterz@...radead.org,
	linux-kernel@...r.kernel.org, pbonzini@...hat.com,
	kvm@...r.kernel.org, seanjc@...gle.com, szy0127@...u.edu.cn,
	thomas.lendacky@....com
Subject: Re: [PATCH][RFC] x86,lib: Add wbinvd_on_many_cpus helpers


* Li RongQing <lirongqing@...du.com> wrote:

> wbinvd_on_many_cpus will call smp_call_function_many(), which should
> be more efficient that iterating cpus since it would run wbinvd()
> concurrently locally and remotely
> 
> it can be used by the below patch
> https://patchwork.kernel.org/project/kvm/patch/1860502863.219296.1710395908135.JavaMail.zimbra@sjtu.edu.cn/
> 
> Cc: Zheyun Shen <szy0127@...u.edu.cn>
> Cc: Tom Lendacky <thomas.lendacky@....com>
> Signed-off-by: Li RongQing <lirongqing@...du.com>
> ---
>  arch/x86/include/asm/smp.h | 7 +++++++
>  arch/x86/lib/cache-smp.c   | 7 +++++++
>  2 files changed, 14 insertions(+)

The two patches should be submitted together within the same series.

Thanks,

	Ingo