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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 617FAC4338F for ; Wed, 4 Aug 2021 08:52:41 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id ECD6860F8F for ; Wed, 4 Aug 2021 08:52:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org ECD6860F8F Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 729028D004C; Wed, 4 Aug 2021 04:52:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6D8EB8D002D; Wed, 4 Aug 2021 04:52:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5C72F8D004C; Wed, 4 Aug 2021 04:52:40 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0225.hostedemail.com [216.40.44.225]) by kanga.kvack.org (Postfix) with ESMTP id 45A418D002D for ; Wed, 4 Aug 2021 04:52:40 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id F4082230F8 for ; Wed, 4 Aug 2021 08:52:39 +0000 (UTC) X-FDA: 78436782480.17.EEF7F63 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by imf07.hostedemail.com (Postfix) with ESMTP id 4DE7E100C105 for ; Wed, 4 Aug 2021 08:52:39 +0000 (UTC) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id 27BB622029; Wed, 4 Aug 2021 08:52:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1628067158; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=0b7BpAenRMJ5oMid71xEw73/C0eBnz+/7D1hkNZyYUk=; b=fnvlgV0kQl5eGqkDNi1u2Fd9DECKfV794NWwudenH7QZzVVYgIWsOBi6tw43Fh4ce4d9Mp 1vv98NW/26rcwniF04DbenIJpRKWAkwzOfU4s1ww693aKL8jcC6ikPXBuELG2IckXoNypI xeRV4NcCVvBCCEz0PRsgzEqqlN8bK4s= Received: from suse.cz (unknown [10.100.201.86]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by relay2.suse.de (Postfix) with ESMTPS id E299EA3B92; Wed, 4 Aug 2021 08:52:37 +0000 (UTC) Date: Wed, 4 Aug 2021 10:52:35 +0200 From: Michal Hocko To: Waiman Long Cc: Thomas Gleixner , Johannes Weiner , Vladimir Davydov , Andrew Morton , Vlastimil Babka , Roman Gushchin , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, Shakeel Butt , Muchun Song , Luis Goncalves , Sebastian Andrzej Siewior , Daniel Bristot de Oliveira , Linus Torvalds Subject: Re: [PATCH] mm/memcg: Disable task obj_stock for PREEMPT_RT Message-ID: References: <20210803175519.22298-1-longman@redhat.com> <87h7g62jxm.ffs@tglx> <8953e099-356e-ee09-a701-f4c7f4cda487@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8953e099-356e-ee09-a701-f4c7f4cda487@redhat.com> X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 4DE7E100C105 Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=suse.com header.s=susede1 header.b=fnvlgV0k; dmarc=pass (policy=quarantine) header.from=suse.com; spf=pass (imf07.hostedemail.com: domain of mhocko@suse.com designates 195.135.220.28 as permitted sender) smtp.mailfrom=mhocko@suse.com X-Stat-Signature: cupjaqi4xynxrs6nfmjua8q9y9r958h6 X-HE-Tag: 1628067159-206549 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue 03-08-21 21:40:35, Waiman Long wrote: [...] > The purpose of this series is to improve kmem_cache allocation and free > performance for non-RT kernel. So not disabling/enabling interrupt help a > bit in this regard. Johannes has explained the irq disabling role in the stock draining just yesterday. Have a look at http://lkml.kernel.org/r/YQlPiLY0ieRb704V@cmpxchg.org -- Michal Hocko SUSE Labs