Messages in this thread | | | Date | Wed, 25 Nov 2015 15:40:57 -0500 | From | Tejun Heo <> | Subject | Re: [PATCH?] race between cgroup_subsys->fork() and cgroup_migrate() |
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On Wed, Nov 25, 2015 at 02:54:10PM -0500, Tejun Heo wrote: > On Wed, Nov 25, 2015 at 02:51:38PM -0500, Tejun Heo wrote: > > Sounds perfect. As this needs to go through -stable, can you please > > resend the patch with proper description and SOB? Please also update > > the now incorrect comment in can_attach. > > Ooh, the patch triggers RCU warning from task_css(). It's spurious > and I think the right thing to do at least for now is using > task_css_check() and explain what's going on.
And I spotted a bug in cgroup core in controller enable path. While the race between fork and attach exists and needs to be fixed, I think the cgroup core bug is the main source of discrepancy. Will update once I learn more.
Thanks.
-- tejun
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