Messages in this thread | | | Date | Tue, 20 Mar 2012 08:53:58 -0700 | From | Tejun Heo <> | Subject | Re: [PATCHSET] block: remove ioc_*_changed() |
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On Tue, Mar 20, 2012 at 11:51:18AM -0400, Vivek Goyal wrote: > So this patch still breaks cic->cfqq association in asynchronous > manner, when new request comes in. So it will still not solve the > problem I reported where after doing IO a task changes cgroup and > tries to delete the old cgroup and hangs forever as cic->cfqq is still > holding a reference to cgroup?
That one is gonna have to be fixed from cgroup side. I already posted a RFC patchset (you were cc'd there, I think). At the moment, the blocking thing is memcg's ->pre_destroy() usage. I'll ping memcg people once more and if modification there isn't feasible, will implement a workaround in cgroup core.
Thanks.
-- tejun
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