Received: by 2002:a05:6a10:8c0a:0:0:0:0 with SMTP id go10csp584035pxb; Wed, 27 Jan 2021 15:52:26 -0800 (PST) X-Google-Smtp-Source: ABdhPJyNi2cfqA0EnR/FBYWnbwcphvKMjUVDmWf1riCyIuPUohT2cnZ7SKF/wPtF4UnoAoPxfGN4 X-Received: by 2002:a50:9f4d:: with SMTP id b71mr11407792edf.310.1611791546206; Wed, 27 Jan 2021 15:52:26 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1611791546; cv=none; d=google.com; s=arc-20160816; b=lV2F6n9kgoIbTfxtwf2f1fH+kAEOyIVhb6Nvk0M/90e3PsZ06IZL7oF57eTyjqnPkS xGqjJuULmMsIksQlAKIij+M1XpjWCFqSZ3VKHnQrJtz6a84Y6ujgafa24rvWvSP94Sad D8rzDNfBVmbZAkq++tyECtEQkcd05UidQrTw7r45ihRppaygJOD1wzFWb9AqfeSrg0go zUVsRJpnVZeB5EeqS3neHoDNU90rKTlV+a411WCEKbJZIIjsdUnw2yU6u7Iy1abVi9mF +8wIiJcueJOPZYfWvBY7M67m2ngESrSWA1QsfZe2aYPmzypF5BBM9fqAj1q/xppycx8i jfxA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date; bh=CsnYb/qxHNW2AdF+/vsmH/JUoBTYtMhkivYqZvyyVhM=; b=Wowg3Fhi1Hx77iKrbfqn60cVQFU8koLRZuQGnsSftWAeys099dzddwDheFETF0TigE boQRryZ4hCWlVp4GxlPKLaQW1mUudbv4s1W6a04KyQd3pW27IlhNCNKqEn+kJrAXxeGx 8Bhes58jVSNwfaIGSrVeLd8QHu3741sLABd87KOuDLUgqOf7pn2a7GGbMA987rvc7CHo ZMMOUIQzFmSeQcN9uBvlsXtxSxNgGnqI0/moEQSscE7XGEgERU0dpKJQT2zxyLSuCyJW Ae9RqewO7hA/I6RL4cplSln/BxYhW6cnbkb7jSqOYznEbU+K7j+vJdpPT2YdJDfRoSqz GBTA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id ia15si1497218ejc.443.2021.01.27.15.52.01; Wed, 27 Jan 2021 15:52:26 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236575AbhA0LYN (ORCPT + 99 others); Wed, 27 Jan 2021 06:24:13 -0500 Received: from mx2.suse.de ([195.135.220.15]:40128 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236028AbhA0LX2 (ORCPT ); Wed, 27 Jan 2021 06:23:28 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 9512AAD26; Wed, 27 Jan 2021 11:22:45 +0000 (UTC) Date: Wed, 27 Jan 2021 12:22:45 +0100 From: Daniel Wagner To: Sebastian Andrzej Siewior Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Jens Axboe , Thomas Gleixner , Peter Zijlstra , Ingo Molnar Subject: Re: [PATCH 2/3] blk-mq: Always complete remote completions requests in softirq Message-ID: <20210127112245.3ce65mlhlzyfdmyv@beryllium.lan> References: <20210123201027.3262800-1-bigeasy@linutronix.de> <20210123201027.3262800-3-bigeasy@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210123201027.3262800-3-bigeasy@linutronix.de> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jan 23, 2021 at 09:10:26PM +0100, Sebastian Andrzej Siewior wrote: > Controllers with multiple queues have their IRQ-handelers pinned to a > CPU. The core shouldn't need to complete the request on a remote CPU. > > Remove this case and always raise the softirq to complete the request. > > Signed-off-by: Sebastian Andrzej Siewior Reviewed-by: Daniel Wagner