From: DDD <dongdong.deng@windriver.com>
To: Frederic Weisbecker <fweisbec@gmail.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: mingo@elte.hu, acme@redhat.com, paulus@samba.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] perf: fix possible divide-by-zero in perf_swevent_overflow()
Date: Mon, 25 Oct 2010 13:58:20 +0800 [thread overview]
Message-ID: <4CC51C7C.3050400@windriver.com> (raw)
In-Reply-To: <20100827133735.GC5241@nowhere>
Frederic Weisbecker wrote:
> On Fri, Aug 27, 2010 at 09:19:39PM +0800, DDD wrote:
>> Peter Zijlstra wrote:
>>> On Fri, 2010-08-27 at 20:21 +0800, DDD wrote:
>>>
>>>>>> Maybe the root cause was from kgdb/hw_breakpoint_layer,
>>>>> Yeah, I think there's a bug in the hw_breakpoint stuff, does something
>>>>> like the below fix it?
>>>> Thanks for your patch, but I still could reproduce the problem with
>>>> your patch.
>>> Frederic, any clue as to what makes hw breakpoints go funny and have
>>> last_period == 0?
>> Hi Peter,
>>
>> Thanks for you take care of it, I have got the root cause of it now.
>>
>> It is the kgdb using hw_breakpoint_layer's API problem, and I have a RFC
>> patch for it.(maybe it is not correctly), I will contact with Jason to
>> fix this problem.
>>
>> Thank you very much,
>> Dongdong
>
>
> Thanks!
>
> We are waiting for your patch then.
Hello Frederic,
Sorry for delay, the patch have been accepted by Jason.
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c1bb9a9c1911036549c5cdfb23f32d7d20ffdc5a
Dongdong
prev parent reply other threads:[~2010-10-25 5:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-26 12:07 [PATCH] perf: fix possible divide-by-zero in perf_swevent_overflow() Dongdong Deng
2010-08-26 12:12 ` Peter Zijlstra
2010-08-26 12:36 ` DDD
2010-08-26 12:58 ` Peter Zijlstra
2010-08-27 12:21 ` DDD
2010-08-27 12:50 ` Peter Zijlstra
2010-08-27 13:19 ` DDD
2010-08-27 13:37 ` Frederic Weisbecker
2010-10-25 5:58 ` DDD [this message]
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