From: Frederic Weisbecker <fweisbec@gmail.com>
To: DDD <dongdong.deng@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
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: Fri, 27 Aug 2010 15:37:37 +0200 [thread overview]
Message-ID: <20100827133735.GC5241@nowhere> (raw)
In-Reply-To: <4C77BB6B.9090706@windriver.com>
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.
next prev parent reply other threads:[~2010-08-27 13:37 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 [this message]
2010-10-25 5:58 ` DDD
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