linux-kernel - Re: [PATCH v2 7/8] perf auxtrace: Use WRITE_ONCE() for updating aux

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Date:   Wed, 9 Jun 2021 08:21:11 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 7/8] perf auxtrace: Use WRITE_ONCE() for updating
 aux_tail

Hi Arnaldo,

On Tue, Jun 08, 2021 at 02:04:30PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Jun 07, 2021 at 05:31:01PM +0200, Peter Zijlstra escreveu:
> > On Wed, Jun 02, 2021 at 06:30:06PM +0800, Leo Yan wrote:
> > > Use WRITE_ONCE() for updating aux_tail, so can avoid unexpected memory
> > > behaviour.
> > > 
> > > Signed-off-by: Leo Yan <leo.yan@...aro.org>
> > 
> > Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> 
> Leo, this one is dependendant on the 6/8, will wait for a resubmission,
> keeping 5/8 tho, as was Acked and applies cleanly, perf/core.

Yeah, will respin for patches 6/8 and 7/8.

Thanks for merging patch 5/8.

Leo