linux-kernel - Re: [PATCH 1/3] cgroups: Add an API to attach a task to current task's cgroup

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Message-ID: <AANLkTinsrFoLVKDFM5pcKcL_6MvAzhR6IzbNmWKh3BDh@mail.gmail.com>
Date:	Thu, 20 May 2010 15:22:15 -0700
From:	Paul Menage <menage@...gle.com>
To:	Sridhar Samudrala <samudrala.sridhar@...il.com>
Cc:	"Michael S. Tsirkin" <mst@...hat.com>,
	netdev <netdev@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] cgroups: Add an API to attach a task to current 
	task's cgroup

On Tue, May 18, 2010 at 5:04 PM, Sridhar Samudrala
<samudrala.sridhar@...il.com> wrote:
> Add a new kernel API to attach a task to current task's cgroup
> in all the active hierarchies.
>
> Signed-off-by: Sridhar Samudrala <sri@...ibm.com>

Reviewed-by: Paul Menage <menage@...gle.com>

It would be more efficient to just attach directly to current->cgroups
rather than potentially creating/destroying one css_set for each
hierarchy until we've completely converged on current->cgroups - but
that would require a bunch of refactoring of the guts of
cgroup_attach_task() to ensure that the right can_attach()/attach()
callbacks are made. That doesn't really seem worthwhile right now for
the initial use, that I imagine isn't going to be
performance-sensitive.

Paul
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