Re: [PATCH 1/3] cgroups: Add an API to attach a task to current task'scgroup

[Sridhar Samudrala]

On 5/20/2010 3:22 PM, Paul Menage wrote:
> On Tue, May 18, 2010 at 5:04 PM, Sridhar Samudrala
> <samudrala.sridhar@xxxxxxxxx>  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@xxxxxxxxxx>
> >      
> Reviewed-by: Paul Menage<menage@xxxxxxxxxx>
>
> 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.
>    
Yes. In our use-case, this will be called only once per guest interface 
when the guest comes up.
Hope you or someone more familiar with cgroups subsystem can optimize 
this function later.

Thanks
Sridhar

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