Re: [4.2] commit d59cfc09c32 (sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem) causes regression for libvirt/kvm

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Hello,

On Wed, Sep 16, 2015 at 02:22:49PM +0200, Oleg Nesterov wrote:
> > If the revert isn't easy, I think backporting rcu_sync is the best bet.
> 
> I leave this to Paul and Tejun... at least I think this is not v4.2 material.

Will route reverts through cgroup branch.  Should be pretty painless.
Nice job on percpu_rwsem.  It's so much better than having to come up
with a separate middleground solution.

Thanks.

-- 
tejun
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