From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with SMTP id A88F76B004F for ; Tue, 13 Jan 2009 22:13:12 -0500 (EST) Received: from m3.gw.fujitsu.co.jp ([10.0.50.73]) by fgwmail5.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id n0E3DA0r004311 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Wed, 14 Jan 2009 12:13:10 +0900 Received: from smail (m3 [127.0.0.1]) by outgoing.m3.gw.fujitsu.co.jp (Postfix) with ESMTP id 0222F45DD7D for ; Wed, 14 Jan 2009 12:13:10 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (s3.gw.fujitsu.co.jp [10.0.50.93]) by m3.gw.fujitsu.co.jp (Postfix) with ESMTP id B83A945DD78 for ; Wed, 14 Jan 2009 12:13:09 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id 8D3141DB8042 for ; Wed, 14 Jan 2009 12:13:09 +0900 (JST) Received: from m107.s.css.fujitsu.com (m107.s.css.fujitsu.com [10.249.87.107]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id 3D8AE1DB803C for ; Wed, 14 Jan 2009 12:13:09 +0900 (JST) Date: Wed, 14 Jan 2009 12:12:05 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [RFC][PATCH 4/4] cgroup-memcg fix frequent EBUSY at rmdir Message-Id: <20090114121205.1bb913aa.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <6599ad830901131905ie10e4bl5168ab7f337b27e1@mail.gmail.com> References: <20090108182556.621e3ee6.kamezawa.hiroyu@jp.fujitsu.com> <20090108183529.b4fd99f4.kamezawa.hiroyu@jp.fujitsu.com> <6599ad830901131848gf7f6996iead1276bc50753b8@mail.gmail.com> <20090114120044.2ecf13db.kamezawa.hiroyu@jp.fujitsu.com> <6599ad830901131905ie10e4bl5168ab7f337b27e1@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Paul Menage Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "balbir@linux.vnet.ibm.com" , "nishimura@mxp.nes.nec.co.jp" , "lizf@cn.fujitsu.com" List-ID: On Tue, 13 Jan 2009 19:05:35 -0800 Paul Menage wrote: > On Tue, Jan 13, 2009 at 7:00 PM, KAMEZAWA Hiroyuki > 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org