linux-kernel - Re: [PATCH v8 10/12] x86/mm: do targeted broadcast flushing from tlbbatch code

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Message-ID: <1f687692160c4c4574588fd2815ab912892ed10c.camel@surriel.com>
Date: Wed, 05 Feb 2025 09:52:22 -0500
From: Rik van Riel <riel@...riel.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org, bp@...en8.de, 
	dave.hansen@...ux.intel.com, zhengqi.arch@...edance.com,
 nadav.amit@...il.com, 	thomas.lendacky@....com, kernel-team@...a.com,
 linux-mm@...ck.org, 	akpm@...ux-foundation.org, jannh@...gle.com,
 mhklinux@...look.com, 	andrew.cooper3@...rix.com, Manali Shukla
 <Manali.Shukla@....com>, 	David.Kaplan@....com
Subject: Re: [PATCH v8 10/12] x86/mm: do targeted broadcast flushing from
 tlbbatch code

On Wed, 2025-02-05 at 14:51 +0100, Peter Zijlstra wrote:
> 
> How about we do something like this instead?
> 
> This keeps all the TLBSYNC in the same task as the INVLPGB, without
> making things complicated and allowing random CR3 writes in between
> them -- which makes my head hurt.

I like your idea better!

Guess I should go make and test a v9 with
the WARN_ONCE in patch 3, and these changes :)

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