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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB388C05027 for ; Thu, 26 Jan 2023 07:46:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235506AbjAZHqg (ORCPT ); Thu, 26 Jan 2023 02:46:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235859AbjAZHqY (ORCPT ); Thu, 26 Jan 2023 02:46:24 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D05166A314; Wed, 25 Jan 2023 23:45:55 -0800 (PST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 9302421C4F; Thu, 26 Jan 2023 07:45:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1674719137; 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=nyfyICH/nuaTPIMu2gFSl4YjBW5PkhozqayimXZNZ+M=; b=nOpFGD4S/OURsfQXM1js173kpvKGKBzy0EeLOpXOxAzYIbZjud1LGPWcyGCuzPRfv/15rr gFZGxHj5K5Asa+oAsIcqDRgvHdi1gPKbeE5F1s5wcpevANvW4xN9xRwUSA7xKzxLfAmSkK Va8Nmt8liDThwSi9/UjWWiRx6zUox0A= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 5D2991358A; Thu, 26 Jan 2023 07:45:37 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id x20gE6Ev0mOwHwAAMHmgww (envelope-from ); Thu, 26 Jan 2023 07:45:37 +0000 Date: Thu, 26 Jan 2023 08:45:36 +0100 From: Michal Hocko To: Marcelo Tosatti Cc: Leonardo =?iso-8859-1?Q?Br=E1s?= , Johannes Weiner , Roman Gushchin , Shakeel Butt , Muchun Song , Andrew Morton , cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 0/5] Introduce memcg_stock_pcp remote draining Message-ID: References: <20230125073502.743446-1-leobras@redhat.com> <9e61ab53e1419a144f774b95230b789244895424.camel@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 25-01-23 15:22:00, Marcelo Tosatti wrote: [...] > Remote draining reduces interruptions whether CPU > is marked as isolated or not: > > - Allows isolated CPUs from benefiting of pcp caching. > - Removes the interruption to non isolated CPUs. See for example > > https://lkml.org/lkml/2022/6/13/2769 This is talking about page allocato per cpu caches, right? In this patch we are talking about memcg pcp caches. Are you sure the same applies here? -- Michal Hocko SUSE Labs