linux-kernel - Re: Attaching a process to cgroups

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Message-ID: <1340267214.29752.40.camel@marge.simpson.net>
Date:	Thu, 21 Jun 2012 10:26:54 +0200
From:	Mike Galbraith <efault@....de>
To:	Alexey Vlasov <renton@...ton.name>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Attaching a process to cgroups

On Thu, 2012-06-21 at 10:23 +0200, Mike Galbraith wrote: 
> On Thu, 2012-06-21 at 11:54 +0400, Alexey Vlasov wrote: 
> > On Wed, Jun 20, 2012 at 02:28:18PM +0200, Mike Galbraith wrote:
> > > 
> > > kernel/cgroup.c::cgroup_attach_task()
> > > {
> > > ...
> > > 	synchronize_rcu();
> > > ...
> > > }
> > 
> > So nothing can be done here? (I mean if only I knew how to fix it I
> > wouldn't ask about it ;)
> 
> Sure, kill the obnoxious thing, it's sitting right in the middle of the
> userspace interface.

Um, lest anyone misunderstand, no, I don't mean by whacking instances of
synchronize_rcu() without further ado :)

-Mike

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