linux-kernel - Re: [PATCH 5.7 000/243] 5.7.10-rc2 review

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Date:   Thu, 23 Jul 2020 20:39:12 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     open list <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Shuah Khan <shuah@...nel.org>, patches@...nelci.org,
        Ben Hutchings <ben.hutchings@...ethink.co.uk>,
        lkft-triage@...ts.linaro.org,
        linux- stable <stable@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        jolsa@...hat.com, Namhyung Kim <namhyung@...nel.org>,
        Leo Yan <leo.yan@...aro.org>,
        Basil Eljuse <Basil.Eljuse@....com>
Subject: Re: [PATCH 5.7 000/243] 5.7.10-rc2 review

On Wed, 22 Jul 2020 at 18:19, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> >
> > Results from Linaro’s test farm.
> > Regressions detected on arm and arm64 (Juno-r2)
> > We are bisecting this problem and get back to you soon.
> >
> > perf test cases failed
> >   perf:
> >     * Track-with-sched_switch
> >     * perf_record_test
> >     * perf_report_test
> >
> > Bad case:
> > [ perf record: Woken up 1 times to write data ]
> > [ perf record: Captured and wrote 0.002 MB perf-lava-test.data ]
> >
> > when it was pass it prints number of samples like below,
> > Good case:
> > [ perf record: Woken up 1 times to write data ]
> > [ perf record: Captured and wrote 0.004 MB perf-lava-test.data (46 samples) ]
> >
> > steps to reproduce:
> > # perf record -e cycles -o perf-lava-test.data ls -a  2>&1 | tee perf-record.log
> >
> > Link to full test:
> > https://qa-reports.linaro.org/lkft/linux-stable-rc-5.7-oe/build/v5.7.9-244-g7d2e5723ce4a/testrun/2969482/suite/perf/test/perf_record_test/log
> >
> > test case:
> > https://github.com/Linaro/test-definitions/blob/master/automated/linux/perf/perf.sh
>
> Any hint by bisection as to what this problem is caused by?

Not yet found the bad commit.
We are working on it.

- Naresh