From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yw0-f173.google.com (mail-yw0-f173.google.com [209.85.161.173]) by kanga.kvack.org (Postfix) with ESMTP id 61E5C6B0256 for ; Tue, 1 Mar 2016 12:06:55 -0500 (EST) Received: by mail-yw0-f173.google.com with SMTP id e63so153734927ywc.3 for ; Tue, 01 Mar 2016 09:06:55 -0800 (PST) Received: from mail-yw0-x242.google.com (mail-yw0-x242.google.com. [2607:f8b0:4002:c05::242]) by mx.google.com with ESMTPS id l203si1226884ybl.30.2016.03.01.09.06.54 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 01 Mar 2016 09:06:54 -0800 (PST) Received: by mail-yw0-x242.google.com with SMTP id f6so9658753ywa.1 for ; Tue, 01 Mar 2016 09:06:54 -0800 (PST) Date: Tue, 1 Mar 2016 12:06:52 -0500 From: Tejun Heo Subject: Re: [PATCH 2/2] cgroup: reset css on destruction Message-ID: <20160301170652.GG3965@htj.duckdns.org> References: <69629961aefc48c021b895bb0c8297b56c11a577.1456830735.git.vdavydov@virtuozzo.com> <92b11b89791412df49e73597b87912e8f143a3f7.1456830735.git.vdavydov@virtuozzo.com> <20160301163018.GE3965@htj.duckdns.org> <20160301165630.GB2426@esperanza> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160301165630.GB2426@esperanza> Sender: owner-linux-mm@kvack.org List-ID: To: Vladimir Davydov Cc: Andrew Morton , Johannes Weiner , Michal Hocko , cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org On Tue, Mar 01, 2016 at 07:56:30PM +0300, Vladimir Davydov wrote: > From: Vladimir Davydov > Subject: [PATCH] cgroup: reset css on destruction > > An associated css can be around for quite a while after a cgroup > directory has been removed. In general, it makes sense to reset it to > defaults so as not to worry about any remnants. For instance, memory > cgroup needs to reset memory.low, otherwise pages charged to a dead > cgroup might never get reclaimed. There's ->css_reset callback, which > would fit perfectly for the purpose. Currently, it's only called when a > subsystem is disabled in the unified hierarchy and there are other > subsystems dependant on it. Let's call it on css destruction as well. > > Suggested-by: Johannes Weiner > Signed-off-by: Vladimir Davydov Applied to cgroup/for-4.6. Thanks. -- tejun -- 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