Re: [RFC PATCH 0/8] cgroup/cpuset: Support RCU_NOCB on isolated partitions

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On 1/17/24 12:07, Tejun Heo wrote:

On Wed, Jan 17, 2024 at 11:35:03AM -0500, Waiman Long wrote:
The first 2 patches are adopted from Federic with minor twists to fix
merge conflicts and compilation issue. The rests are for implementing
the new cpuset.cpus.isolation_full interface which is essentially a flag
to globally enable or disable full CPU isolation on isolated partitions.
I think the interface is a bit premature. The cpuset partition feature is
already pretty restrictive and makes it really clear that it's to isolate
the CPUs. I think it'd be better to just enable all the isolation features
by default. If there are valid use cases which can't be served without
disabling some isolation features, we can worry about adding the interface
at that point.

My current thought is to make isolated partitions act like isolcpus=domain, additional CPU isolation capabilities are optional and can be turned on using isolation_full. However, I am fine with making all these turned on by default if it is the consensus.


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