Re: [PATCH v5 4/9] perf/x86: Add compiler barrier after updating BTS
From: Peter Zijlstra <peterz@infradead.org>
Date: 2021-09-14 11:55:14
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On Tue, Sep 14, 2021 at 06:05:17PM +0800, Leo Yan wrote:
Hi Peter, On Tue, Sep 14, 2021 at 11:51:36AM +0200, Peter Zijlstra wrote:quoted
On Sun, Aug 29, 2021 at 06:56:57PM +0800, Leo Yan wrote:quoted
Hi Peter, or any x86 maintainer, On Mon, Aug 09, 2021 at 07:14:02PM +0800, Leo Yan wrote:quoted
Since BTS is coherent, simply add a compiler barrier to separate the BTS update and aux_head store.Could you reivew this patch and check if BTS needs the comipler barrier in this case? Thanks.Yes, a compiler barrier is sufficient. You want me to pick it up?Maybe other maintainers are more suitable than me to answer this :) Yeah, I think it's great if you could pick it.
OK, done.