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=-8.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 3EC5EC433E0 for ; Wed, 27 Jan 2021 11:24:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DD3DD2076B for ; Wed, 27 Jan 2021 11:24:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236093AbhA0LYB (ORCPT ); Wed, 27 Jan 2021 06:24:01 -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-block@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