Re: [RFC][PATCH 4/4] cgroup-memcg fix frequent EBUSY at rmdir

[KAMEZAWA Hiroyuki]

On Tue, 13 Jan 2009 19:05:35 -0800
Paul Menage <menage@xxxxxxxxxx> wrote:

> On Tue, Jan 13, 2009 at 7:00 PM, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote:
> >
> > Hmm, add wait_queue to css and wake it up at css_put() ?
> >
> > like this ?
> > ==
> > __css_put()
> > {
> >        if (atomi_dec_return(&css->refcnt) == 1) {
> >                if (notify_on_release(cgrp) {
> >                        .....
> >                }
> >                if (someone_waiting_rmdir(css)) {
> >                        wake_up_him().
> >                }
> >        }
> > }
> 
> Yes, something like that. A system-wide wake queue is probably fine though.
> 
Ok, I'll try that.

-Kame

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