On 07/05/25 8:22 pm, Chen, Yu C wrote:
Hi Venkat,
On 5/7/2025 10:32 PM, Venkat Rao Bagalkote wrote:
Hello Chenyu,
On 07/05/25 4:44 pm, Chen Yu wrote:
Introducing the task migration and swap statistics in the following
places:
/sys/fs/cgroup/{GROUP}/memory.stat
/proc/{PID}/sched
/proc/vmstat
These statistics facilitate a rapid evaluation of the performance
and resource
utilization of the target workload.
Patch 1 is a fix from Libo to avoid task swapping for kernel threads,
because Numa balance only cares about the user pages via VMA.
Patch 2 is the major change to expose the statistics of task
migration and
swapping in corresponding files.
The reason to fold patch 1 and patch 2 into 1 patch set is that
patch 1 is
necessary for patch 2 to avoid accessing a NULL mm_struct from a kernel
thread, which causes NULL pointer exception.
The Tested-by and Acked-by tags are preserved, because these tags
are provided
in version 1 which has the p->mm check.
I see below tags from version 1 are missing. I think, its
contridicting to the above line. Please correct me, If I am wrong.
Tested-by: Madadi Vineeth Reddy <vineethr@xxxxxxxxxxxxx>
Tested-by: K Prateek Nayak <kprateek.nayak@xxxxxxx>
These tags are in the patch 2/2, because Madadi and Prateek mainly
tested patch 2/2.
Understood. Thanks for clarification.
For some reason, I am not able to apply this patch on top of
next-20250506. I see patch002 fails to apply. Please find the errors
below.
next-20250507 should be OK(I just checked on top of commit 08710e696081).
next-20250506 might still have the old patch 2/2, and next-20250507 has
reverted it.
With next-20250507, there is a build issue [1]
<https://lore.kernel.org/all/1bcc235f-b139-4423-a7bd-2dd16065e08c@xxxxxxxxxxxxx/>
, I will test this, once the build issue fixed.
Regards,
Venkat.
thanks,
Chenyu
