Hello. On Wed, Mar 22, 2023 at 02:25:25PM +0000, Florian Schmidt <flosch@xxxxxxxxxxx> wrote: > cgroups v1 has a unique way of setting up memory pressure notifications: ... > There are several ways around this issue, but adding a dummy read > handler seems like the least invasive to me. I'd be interested to hear: > (a) do you think there is a less invasive way? Alternatively, we could > add a flag in cftype in include/linux/cgroup-defs.h, but that seems > more invasive for what is a legacy interface. You can (as privileged user) modify file perms in userspace first (e.g. chmod o+r memory.pressure_level) and then it can used by non-privileged users. (Or do LSM prevent you from that too?) > (b) would you be interested to take this patch, or is it too niche a fix > for a legacy subsystem? I'd rather not extend this "unique way" with additionally unique dummy helpers. My 0.02 €, Michal
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