From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06B6AC433F5 for ; Tue, 4 Sep 2018 17:45:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AE45F206BA for ; Tue, 4 Sep 2018 17:45:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AE45F206BA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727186AbeIDWLx (ORCPT ); Tue, 4 Sep 2018 18:11:53 -0400 Received: from mx2.suse.de ([195.135.220.15]:45086 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726052AbeIDWLx (ORCPT ); Tue, 4 Sep 2018 18:11:53 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 80EA6AF3A; Tue, 4 Sep 2018 17:45:44 +0000 (UTC) Date: Tue, 4 Sep 2018 19:45:43 +0200 From: Michal Hocko To: Mikulas Patocka Cc: Mike Snitzer , jing xia , agk@redhat.com, dm-devel@redhat.com, linux-kernel@vger.kernel.org Subject: Re: dm bufio: Reduce dm_bufio_lock contention Message-ID: <20180904174543.GQ14951@dhcp22.suse.cz> References: <20180612212007.GA22717@redhat.com> <20180614073153.GB9371@dhcp22.suse.cz> <20180904070824.GH14951@dhcp22.suse.cz> <20180904151844.GB10112@redhat.com> <20180904160732.GO14951@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 04-09-18 13:30:44, Mikulas Patocka wrote: > > > On Tue, 4 Sep 2018, Michal Hocko wrote: > > > Regarding other other workloads. AFAIR the problem was due to the > > wait_iff_congested in the direct reclaim. And I've been arguing that > > special casing __GFP_NORETRY is not a propoer way to handle that case. > > We have PF_LESS_THROTTLE to handle cases where the caller cannot be > > really throttled because it is a part of the congestion control. I dunno > > what happened in that regards since then though. > > -- > > Michal Hocko > > SUSE Labs > > So, could you take this patch https://patchwork.kernel.org/patch/10505523/ > and commit it to the kernel? > > You agreed with that patch, but you didn't commit it. Because I do not maintain any tree that Linus pulls from. You need to involve Andrew Morton to get this to the mm tree and then to Linus. -- Michal Hocko SUSE Labs From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Hocko Subject: Re: dm bufio: Reduce dm_bufio_lock contention Date: Tue, 4 Sep 2018 19:45:43 +0200 Message-ID: <20180904174543.GQ14951@dhcp22.suse.cz> References: <20180612212007.GA22717@redhat.com> <20180614073153.GB9371@dhcp22.suse.cz> <20180904070824.GH14951@dhcp22.suse.cz> <20180904151844.GB10112@redhat.com> <20180904160732.GO14951@dhcp22.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Mikulas Patocka Cc: dm-devel@redhat.com, agk@redhat.com, jing xia , Mike Snitzer , linux-kernel@vger.kernel.org List-Id: dm-devel.ids On Tue 04-09-18 13:30:44, Mikulas Patocka wrote: > > > On Tue, 4 Sep 2018, Michal Hocko wrote: > > > Regarding other other workloads. AFAIR the problem was due to the > > wait_iff_congested in the direct reclaim. And I've been arguing that > > special casing __GFP_NORETRY is not a propoer way to handle that case. > > We have PF_LESS_THROTTLE to handle cases where the caller cannot be > > really throttled because it is a part of the congestion control. I dunno > > what happened in that regards since then though. > > -- > > Michal Hocko > > SUSE Labs > > So, could you take this patch https://patchwork.kernel.org/patch/10505523/ > and commit it to the kernel? > > You agreed with that patch, but you didn't commit it. Because I do not maintain any tree that Linus pulls from. You need to involve Andrew Morton to get this to the mm tree and then to Linus. -- Michal Hocko SUSE Labs