From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f41.google.com (mail-wm0-f41.google.com [74.125.82.41]) by kanga.kvack.org (Postfix) with ESMTP id 17F966B0256 for ; Tue, 1 Mar 2016 14:55:45 -0500 (EST) Received: by mail-wm0-f41.google.com with SMTP id p65so49027336wmp.0 for ; Tue, 01 Mar 2016 11:55:45 -0800 (PST) Received: from gum.cmpxchg.org (gum.cmpxchg.org. [85.214.110.215]) by mx.google.com with ESMTPS id 62si844544wmc.4.2016.03.01.11.55.44 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 01 Mar 2016 11:55:44 -0800 (PST) Date: Tue, 1 Mar 2016 14:54:38 -0500 From: Johannes Weiner Subject: Re: [PATCH 2/2] cgroup: reset css on destruction Message-ID: <20160301195438.GB22717@cmpxchg.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: Tejun Heo , Andrew Morton , 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 It's already in a git tree, but FWIW Acked-by: Johannes Weiner -- 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