Re: [PATCH] fpga: dfl: fme: Fix cpu hotplug issue in performance reporting
Date: Tue Jun 29 2021 - 04:09:21 EST
On 6/29/21 12:57 PM, Greg KH wrote:
> On Tue, Jun 29, 2021 at 12:45:20PM +0530, kajoljain wrote:
>> On 6/28/21 3:47 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.
>> Adding stable@xxxxxxxxxxxxxxx in cc list as suggested by Moritz Fischer.
> This is not the correct way to submit patches for inclusion in the
> stable kernel tree. Please read:
> for how to do this properly.
Thanks Greg for pointing it, I will take care in my next version.