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SubjectRe: [syzbot] WARNING in cpuset_write_resmask
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On 2/22/22 12:26, Tejun Heo wrote:
> (cc'ing Waiman and quoting whole body)
>
> Hello, Waiman.
>
> It looks like it's hitting
>
> WARN_ON(!is_in_v2_mode() && !nodes_equal(cp->mems_allowed, cp->effective_mems))
>
> Can you take a look?

My preliminary analysis is that the warning may be caused by my commit
1f1562fcd04a ("cgroup/cpuset: Don't let child cpusets restrict parent in
default hierarchy") since the merge branch e5313968c41b is missing the
fix commit d068eebbd482 ("cgroup/cpuset: Make child cpusets restrict
parents on v1 hierarchy"). I believe the problem should be gone once the
merge branch is updated to a later upstream baseline.

Cheers,
Longman

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