Thread (4 messages) 4 messages, 2 authors, 2021-08-02

Re: [PATCH v3] fpga: dfl: fme: Fix cpu hotplug issue in performance reporting

From: kajoljain <hidden>
Date: 2021-08-02 11:47:06
Also in: linux-fpga, linuxppc-dev, lkml, stable


On 8/2/21 2:28 PM, Moritz Fischer wrote:
On Mon, Aug 02, 2021 at 01:15:00PM +0530, kajoljain wrote:
quoted

On 7/13/21 1:12 PM, Kajol Jain wrote:
quoted
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 <redacted>
Signed-off-by: Kajol Jain <redacted>
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
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