Re: [PATCH v3] sched: cpuset: Don't rebuild root domains on suspend-resume

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On 3/8/23 05:19, Juri Lelli wrote:
On 01/03/23 17:03, Qais Yousef wrote:
On 03/01/23 15:26, Juri Lelli wrote:
On 01/03/23 12:28, Qais Yousef wrote:
On 03/01/23 08:31, Juri Lelli wrote:
...

Not ignoring you guys here, but it turns out I'm quite bogged down with
other stuff at the moment. :/ So, apologies and I'll try to get to this
asap. Thanks a lot for all your efforts and time reviewing so far!
Np, I can feel you :-)
Eh. :/
I hope I did not offend. That was meant as no pressure, I understand.
No offence at all! I meant "we are all on the same boat it seems". :)

BTW, do you have a repro script of some sort handy I might play with?
Sorry no. You'll just need to suspend to ram. I had a simple patch to measure
the time around the call and trace_printk'ed the result.

I was working on a android phone which just suspends to ram if you turn the
screen off and disconnect the usb.
Looks like I could come up with the following

https://github.com/jlelli/linux.git deadline/rework-cpusets
https://github.com/jlelli/linux/tree/deadline/rework-cpusets

which I don't think it's at a point that I feel comfortable to propose
as an RFC (not even sure if it actually makes sense), but it survived my
very light testing.

I like your patch to revert the cpuset_rwsem change. In fact, I was planning to ask you about that. It is causing a lot more latency in workloads that need to change cpuset configuration rather frequently.

Cheers,
Longman




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