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

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Message-ID: <CAFpQJXV08nwFLmuQiWuxRLa4A2w87+yD_LRw_5+JL6KhVVstzA@mail.gmail.com>
Date:   Fri, 9 Jun 2017 10:03:19 +0530
From:   Ganapatrao Kulkarni <gpkulkarni@...il.com>
To:     Mark Rutland <mark.rutland@....com>, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, Ingo Molnar <mingo@...hat.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "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

ping?

On Tue, May 23, 2017 at 8:44 PM, Ganapatrao Kulkarni
<gpkulkarni@...il.com> wrote:
> 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