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Message-ID: <4DA50430.8020701@cn.fujitsu.com> Date: Wed, 13 Apr 2011 10:02:24 +0800 From: Li Zefan <lizf@...fujitsu.com> To: Mike Galbraith <efault@....de> CC: LKML <linux-kernel@...r.kernel.org>, Paul Menage <menage@...gle.com>, Colin Cross <ccross@...roid.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Ingo Molnar <mingo@...e.hu> Subject: Re: query: [PATCH 2/2] cgroup: Remove call to synchronize_rcu in cgroup_attach_task 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. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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