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From: kajoljain <kjain@linux.ibm.com>
To: Moritz Fischer <mdf@kernel.org>
Cc: will@kernel.org, hao.wu@intel.com, mark.rutland@arm.com,
	trix@redhat.com, yilun.xu@intel.com, linux-fpga@vger.kernel.org,
	maddy@linux.ibm.com, atrajeev@linux.vnet.ibm.com,
	linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	rnsastry@linux.ibm.com, linux-perf-users@vger.kernel.org,
	stable@vger.kernel.org
Subject: Re: [PATCH v3] fpga: dfl: fme: Fix cpu hotplug issue in performance reporting
Date: Mon, 2 Aug 2021 17:16:42 +0530	[thread overview]
Message-ID: <0d31afc5-b86e-4da6-878c-be4ba7b4a23a@linux.ibm.com> (raw)
In-Reply-To: <YQezqZcOrePV/FnW@archbook>



On 8/2/21 2:28 PM, Moritz Fischer wrote:
> On Mon, Aug 02, 2021 at 01:15:00PM +0530, kajoljain wrote:
>>
>>
>> On 7/13/21 1:12 PM, Kajol Jain wrote:
>>> The performance reporting driver added cpu hotplug
>>> feature but it didn't add pmu migration call in cpu
>>> offline function.
>>> This can create an issue incase the current designated
>>> cpu being used to collect fme pmu data got offline,
>>> as based on current code we are not migrating fme pmu to
>>> new target cpu. Because of that perf will still try to
>>> fetch data from that offline cpu and hence we will not
>>> get counter data.
>>>
>>> Patch fixed this issue by adding pmu_migrate_context call
>>> in fme_perf_offline_cpu function.
>>>
>>> Fixes: 724142f8c42a ("fpga: dfl: fme: add performance reporting support")
>>> Tested-by: Xu Yilun <yilun.xu@intel.com>
>>> Acked-by: Wu Hao <hao.wu@intel.com>
>>> Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
>>> Cc: stable@vger.kernel.org
>>> ---
>>
>> Any update on this patch? Please let me know if any changes required.
>>
>> Thanks,
>> Kajol Jain
> 
> It's in my 'fixes' branch.

Thanks Moritz for informing me.

Thanks,
Kajol Jain

> 
> - Moritz
> 

      reply	other threads:[~2021-08-02 11:47 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-13  7:42 [PATCH v3] fpga: dfl: fme: Fix cpu hotplug issue in performance reporting Kajol Jain
2021-08-02  7:45 ` kajoljain
2021-08-02  8:58   ` Moritz Fischer
2021-08-02 11:46     ` kajoljain [this message]

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