[PATCH] cgroup/dmem: Don't clobber pool in dmem_cgroup_calculate_protection

[Michal Koutný]

On Tue, Jan 14, 2025 at 04:39:12PM +0100, Friedrich Vock <friedrich.vock at gmx.de> wrote:
> If the current css doesn't contain any pool that is a descendant of
> the "pool" (i.e. when found_descendant == false), then "pool" will
> point to some unrelated pool. If the current css has a child, we'll
> overwrite parent_pool with this unrelated pool on the next iteration.

Could this be verified with more idiomatic way with
cgroup_is_descendant()? (The predicate could be used between pools [1]
if they pin respective cgroups).

Thanks,
Michal

[1] https://lore.kernel.org/all/uj6railxyazpu6ocl2ygo6lw4lavbsgg26oq57pxxqe5uzxw42@fhnqvq3tia6n/
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