Hello, Matt. On Thu, Sep 08, 2011 at 11:01:59AM -0700, Matt Helsley wrote: > Looking at the code and docs I realize I didn't explicitly mention that > kthreads could not be frozen by the cgroup freezer. However, the code did > not allow it. When freezing tasks the cgroup freezer always did: > > freeze_task(task, true) > > which would only freeze tasks without PF_FREEZER_NOSIG due to the second > "sig_only" parameter. I believe this means it could not be used to > freeze kthreads. > > My feeling is kthreads should not be "managed" directly by userspace. > Especially if that includes the ability to arbitrarily stop or freeze them. > So it seems more appropriate to explicitly disallow freezing of kthreads > via the cgroup freezer. Oh yeah, that's what we should do and maybe that's what the current code intends to achieve too but currently it ends up triggering BUG_ON(). Thanks. -- tejun _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
