On Sun, Feb 05, 2023 at 05:55:41PM +0200, Ofir Gal <ofir.gal@xxxxxxxxxxx> wrote: > I have tried to limit the SSD on Server #1, but it seems that the NVME > target kworkers are not affected unless I use Yu Kuai's patch. > > Can you elaborate on the issues with this patch or how the scenario > described above can be done with cgroups v2? The issue is that if there's a client that doesn't implement self-throttling you cannot guarantee anything on the server side. Hence the mechanism must exist on the server side. The NVME target should charge IO to respective blkcg's (just a generic advice, I'm not familiar with that interface; see also kthread_associate_blkcg() use in loop device driver). HTH, Michal
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