From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751348AbdAQQuK (ORCPT ); Tue, 17 Jan 2017 11:50:10 -0500 Received: from mail-pg0-f68.google.com ([74.125.83.68]:33358 "EHLO mail-pg0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751031AbdAQQuB (ORCPT ); Tue, 17 Jan 2017 11:50:01 -0500 Date: Tue, 17 Jan 2017 08:49:13 -0800 From: Tejun Heo To: Joonsoo Kim Cc: vdavydov.dev@gmail.com, cl@linux.com, penberg@kernel.org, rientjes@google.com, akpm@linux-foundation.org, jsvana@fb.com, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, kernel-team@fb.com Subject: Re: [PATCHSET v2] slab: make memcg slab destruction scalable Message-ID: <20170117164913.GB28948@mtj.duckdns.org> References: <20170114184834.8658-1-tj@kernel.org> <20170117001256.GB25218@js1304-P5Q-DELUXE> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170117001256.GB25218@js1304-P5Q-DELUXE> User-Agent: Mutt/1.7.1 (2016-10-04) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Tue, Jan 17, 2017 at 09:12:57AM +0900, Joonsoo Kim wrote: > Could you confirm that your series solves the problem that is reported > by Doug? It would be great if the result is mentioned to the patch > description. > > https://bugzilla.kernel.org/show_bug.cgi?id=172991 So, that's an issue in the creation path which is already resolved by switching to an ordered workqueue (it'd probably be better to use per-cpu wq w/ @max_active == 1 tho). This patchset is about relesae path. slab_mutex contention would definitely go down with this but I don't think there's more connection to it than that. Thanks. -- tejun