From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935048AbcA0Srz (ORCPT ); Wed, 27 Jan 2016 13:47:55 -0500 Received: from gum.cmpxchg.org ([85.214.110.215]:55114 "EHLO gum.cmpxchg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934178AbcA0Srv (ORCPT ); Wed, 27 Jan 2016 13:47:51 -0500 Date: Wed, 27 Jan 2016 13:47:01 -0500 From: Johannes Weiner To: Vladimir Davydov Cc: Andrew Morton , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] vmpressure: Fix subtree pressure detection Message-ID: <20160127184701.GA31360@cmpxchg.org> References: <1453912137-25473-1-git-send-email-vdavydov@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1453912137-25473-1-git-send-email-vdavydov@virtuozzo.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 27, 2016 at 07:28:57PM +0300, Vladimir Davydov wrote: > When vmpressure is called for the entire subtree under pressure we > mistakenly use vmpressure->scanned instead of vmpressure->tree_scanned > when checking if vmpressure work is to be scheduled. This results in > suppressing all vmpressure events in the legacy cgroup hierarchy. Fix > it. > > Fixes: 8e8ae645249b ("mm: memcontrol: hook up vmpressure to socket pressure") > Signed-off-by: Vladimir Davydov Acked-by: Johannes Weiner