linux-kernel - Re: [PATCH 0/2] perf stat: fix segfault when closing events

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Date:   Tue, 23 May 2017 20:44:22 +0530
From:   Ganapatrao Kulkarni <gpkulkarni@...il.com>
To:     Mark Rutland <mark.rutland@....com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        acme@...nel.org, alexander.shishkin@...ux.intel.com,
        "ganapatrao.kulkarni@...ium.com" <ganapatrao.kulkarni@...ium.com>,
        Jayachandran C <jnair@...iumnetworks.com>,
        gpkulkarni <gpkulkarni@...il.com>
Subject: Re: [PATCH 0/2] perf stat: fix segfault when closing events

On Tue, May 23, 2017 at 3:34 PM, Mark Rutland <mark.rutland@....com> wrote:
> Hi,
>
> Does anyone have any comments on these?
>
> I'm happy to rebase/resend if necessary.
>
> I'd very much like to see this fixed.

arm64 platforms have dependency on this patch set to use latest perf tool.
Earliest merge/review is much appreciated!!

>
> Thanks,
> Mark.
>
> On Fri, Apr 28, 2017 at 12:47:08PM +0100, Mark Rutland wrote:
>> Hi,
>>
>> These patches fix a segfault seen in some cases when perf stat is exiting.
>>
>> We don't balance opening/closing of events in all cases, and go out-of-bounds
>> when we close events. Full details in the patch 2 commit message.
>>
>> Thanks,
>> Mark.
>>
>> Mark Rutland (2):
>>   perf evsel: add per{cpu,thread} close helpers
>>   perf stat: balance opening/closing of events
>>
>>  tools/perf/builtin-stat.c | 24 +++++++++++++++++++++++-
>>  tools/perf/util/evsel.c   | 26 ++++++++++++++++++++------
>>  tools/perf/util/evsel.h   |  4 ++++
>>  3 files changed, 47 insertions(+), 7 deletions(-)
>>
>> --
>> 1.9.1
>>

thanks
Ganapat