Messages in this thread | | | Date | Wed, 12 Oct 2011 22:16:41 +0400 | From | Cyrill Gorcunov <> | Subject | Re: A Plumber’ s Wish List for Linux |
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On Wed, Oct 12, 2011 at 10:40:14AM -0700, Tejun Heo wrote: ... > > In general, I think making freezer work nicely with the rest of the > system is a good idea and have been working towards that direction. > Allowing a frozen task to be killed is not only handy for use cases > like above but also makes solving freezer involved deadlocks much less > likely and easier to solve. Another that I have in mind is allowing > ptrace from unfrozen task to a frozen task. This can be helpful in > general debugging (currently attaching to multi-threaded, violently > cloning process is quite cumbersome) and userland checkpointing.
Yeah, being able to ptrace a frozen cgroup would be great for us. We stick with signals start/stop cycle at moment but the final target is the cgroups and freezer of course. (btw while were poking freezer code I noticed that there is no shortcut to move all tasks in cgroup into the root cgroup, so I guess say "echo -1 > tasks" might be a good addition to move all tasks from some particular cgroup to the root by single action).
> > I was working toward these and had some of the patches in Rafael's > tree but then korg went down and we lost track of the tree and I had a > pretty long vacation. I can't say for sure but am aiming to achieve > the goals during the next devel cycle. >
This is a wishlist after all, so target is pointed and only time is needed to implement all this ;)
Cyrill
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