On Thu, Jan 14, 2021 at 10:08:19PM +0800, chenzhou <chenzhou10@xxxxxxxxxx> wrote: > In this case, at the beginning of function check_cgroupfs_options(), the mask > ctx->subsys_mask will be 0. And if we mount without 'none' and 'name=' options, > then in check_cgroupfs_options(), the flag ctx->all_ss will be set, that is, select all the subsystems. But even then, the line https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/kernel/cgroup/cgroup-v1.c?h=v5.11-rc3#n1012 would select only 'enabled' controllers, wouldn't it? It's possible I missed something but if this means that cgroup_no_v1= doesn't hold to its expectations, I'd suggest adding proper Fixes: tag to the patch. Thanks, Michal
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