linux-kernel - Re: [PATCH v6 09/12] x86/mm: enable broadcast TLB invalidation for multi-threaded processes

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Message-ID: <48566857457796507d57ae0fb19fda16f6c3e8c6.camel@surriel.com>
Date: Wed, 22 Jan 2025 20:40:36 -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
Subject: Re: [PATCH v6 09/12] x86/mm: enable broadcast TLB invalidation for
 multi-threaded processes

On Tue, 2025-01-21 at 11:33 +0100, Peter Zijlstra wrote:
> On Tue, Jan 21, 2025 at 10:55:07AM +0100, Peter Zijlstra wrote:
> > 
> > Can't we just start with a very simple constant test and poke at
> > things
> > if/when its found to not work?
> 
> Something like so perhaps?

I've applied your suggestions, with the exception of some
code that was already simplified further based on other
people's suggestions (get_global_asid is no longer a loop).

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