Re: query: [PATCH 2/2] cgroup: Remove call to synchronize_rcu incgroup_attach_task

[Li Zefan]

Mike Galbraith wrote:
> Greetings,
> 
> Wrt these patches:
> 
> https://lkml.org/lkml/2010/11/24/14 [PATCH 1/2] cgroup: Set CGRP_RELEASABLE when adding to a cgroup
> https://lkml.org/lkml/2010/11/24/15 [PATCH 2/2] cgroup: Remove call to synchronize_rcu in cgroup_attach_task
> 
> I received a query regarding 2/2 because a large database company is
> apparently moving tasks between cgroups frequently enough that their
> database initialization time dropped from ~11 hours to ~4 hours when
> they applied this patch.
> 
> Curious why these got no traction.

I thought Paul was following the this. I'll spend some time on patch
review.

> 
> Regardless of the wisdom of frequent cgroup moves, Joe User launching
> light tasks via cgexec would gain quite a bit as well it seems.
> 
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