On Tue, Mar 30, 2021 at 11:00:36AM +0200, Arnd Bergmann wrote:
> Would it be possible to enclose most or all of kernel/cgroup/cgroup.c
> in an #ifdef CGROUP_SUBSYS_COUNT block?
Even without any controllers, there can still be named hierarchies (v1)
or the default hierarchy (v2) (for instance) for
On Tue, Mar 30, 2021 at 10:41 AM Michal Koutný wrote:
>
> On Mon, Mar 22, 2021 at 05:02:44PM +0100, Arnd Bergmann
> wrote:
> > I'm not sure what is expected to happen for such a configuration,
> > presumably these functions are never calls in that case.
> Yes, the functions you patched would onl
On Mon, Mar 22, 2021 at 05:02:44PM +0100, Arnd Bergmann wrote:
> I'm not sure what is expected to happen for such a configuration,
> presumably these functions are never calls in that case.
Yes, the functions you patched would only be called from subsystems or
there should be no way to obtain a st
From: Arnd Bergmann
When cgroups are enabled, but every single subsystem is turned off,
CGROUP_SUBSYS_COUNT is zero, and the cgrp->subsys[] array has no
members.
gcc-11 points out that this leads to an invalid access in any function
that might access this array:
kernel/cgroup/cgroup.c: In funct
