Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1162173AbbKERpq (ORCPT ); Thu, 5 Nov 2015 12:45:46 -0500 Received: from resqmta-ch2-10v.sys.comcast.net ([69.252.207.42]:40966 "EHLO resqmta-ch2-10v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752928AbbKERpo (ORCPT ); Thu, 5 Nov 2015 12:45:44 -0500 Date: Thu, 5 Nov 2015 11:45:42 -0600 (CST) From: Christoph Lameter X-X-Sender: cl@east.gentwo.org To: Tetsuo Handa cc: mhocko@kernel.org, htejun@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, rientjes@google.com, oleg@redhat.com, kwalker@redhat.com, akpm@linux-foundation.org, hannes@cmpxchg.org, vdavydov@parallels.com, skozina@redhat.com, mgorman@suse.de, riel@redhat.com Subject: Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable() checks In-Reply-To: <201511052359.JBB24816.FHtFOJOSLOVMQF@I-love.SAKURA.ne.jp> Message-ID: References: <20151022143349.GD30579@mtj.duckdns.org> <20151022151414.GF30579@mtj.duckdns.org> <20151023042649.GB18907@mtj.duckdns.org> <20151102150137.GB3442@dhcp22.suse.cz> <201511052359.JBB24816.FHtFOJOSLOVMQF@I-love.SAKURA.ne.jp> Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 784 Lines: 18 On Thu, 5 Nov 2015, Tetsuo Handa wrote: > memory allocation. By allowing workqueue items to be processed (by using > short sleep), some task might release memory when workqueue item is > processed. > > Therefore, not only to keep vmstat counters up to date, but also for > avoid wasting CPU cycles, I prefer a short sleep. Sorry but we need work queue processing for vmstat counters that is independent of other requests submitted that may block. Adding points where we sleep / schedule everywhere to do this is not the right approach. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/