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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AD6DDE7719E for ; Mon, 13 Jan 2025 07:13:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=cMCQSOX1uo6qNSIkIuDnMg3sFAMfn/oPf9iHmN+dSF8=; b=SaRXHSKYaMUstzZqYGBvx1hDJS KUQHatbrw/y51wp/1wrBCBMkzj4xNRdFa4x6Xq/5iWPlDlDbBHMHL9FU/eA+1Bhs5FE0ndT0KBiJT aPGZohWuhC5hcU0hbQxmZCdqgXo2CrAoyoz6G2Vbp6ZhQnZXOjbd0On8AqcHF0b0BDHpfDF+icGWc cvTYsV/Bpxl789eT8XRfVglB+Nwk5zRxJEGklSb3nxY56GLS7U3is0zAPiYZLjkPgIBq5lTED5kRw X11S+VhYZDcDWbZRVOC49o1kHStaxuIX7xpshox4Vc24a4dSfEzoIpfefv69oGqaBVvX85/NCyUac UosCzong==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tXEdQ-00000004DDR-1NcM; Mon, 13 Jan 2025 07:13:16 +0000 Received: from smtp-out2.suse.de ([2a07:de40:b251:101:10:150:64:2]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tXEdN-00000004DD0-1nzN for linux-nvme@lists.infradead.org; Mon, 13 Jan 2025 07:13:14 +0000 Received: from imap1.dmz-prg2.suse.org (unknown [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 95D0A1F365; Mon, 13 Jan 2025 07:13:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1736752391; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cMCQSOX1uo6qNSIkIuDnMg3sFAMfn/oPf9iHmN+dSF8=; b=FQgsBOt3PQ+0L7ZIaJMrgvclhvXixwpCSd5t9GOkznmy6UJxiPnA+9cfmeurhtNIzvnKLF X8ZW7aUxkvQ4vVzmh79Bh8+3kcbXFQz3be5XBbDImtVV3MNIXNuGCvpba1+ipy4nJa6hjD XYEuVWHQHNfJSrkAydOnc7PMA0pTCwE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1736752391; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cMCQSOX1uo6qNSIkIuDnMg3sFAMfn/oPf9iHmN+dSF8=; b=pPCelx9hM2bir/xoh/9pTo1LTyDd1AaPfAMAbLcptg9EAXKoRjTMtkmf/2PMmTybHaM8M/ LaOXoITBwFqu53Aw== Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1736752391; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cMCQSOX1uo6qNSIkIuDnMg3sFAMfn/oPf9iHmN+dSF8=; b=FQgsBOt3PQ+0L7ZIaJMrgvclhvXixwpCSd5t9GOkznmy6UJxiPnA+9cfmeurhtNIzvnKLF X8ZW7aUxkvQ4vVzmh79Bh8+3kcbXFQz3be5XBbDImtVV3MNIXNuGCvpba1+ipy4nJa6hjD XYEuVWHQHNfJSrkAydOnc7PMA0pTCwE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1736752391; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cMCQSOX1uo6qNSIkIuDnMg3sFAMfn/oPf9iHmN+dSF8=; b=pPCelx9hM2bir/xoh/9pTo1LTyDd1AaPfAMAbLcptg9EAXKoRjTMtkmf/2PMmTybHaM8M/ LaOXoITBwFqu53Aw== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id B17C813876; Mon, 13 Jan 2025 07:13:10 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id s0aaKQa9hGcRKwAAD6G6ig (envelope-from ); Mon, 13 Jan 2025 07:13:10 +0000 Message-ID: <7beae89f-182d-4d88-a6a5-fffd4324dcda@suse.de> Date: Mon, 13 Jan 2025 08:13:10 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 7/9] blk-mq: use hk cpus only when isolcpus=managed_irq is enabled To: Daniel Wagner , Jens Axboe , Keith Busch , Christoph Hellwig , Sagi Grimberg , "Michael S. Tsirkin" Cc: "Martin K. Petersen" , Thomas Gleixner , Costa Shulyupin , Juri Lelli , Valentin Schneider , Waiman Long , Ming Lei , Frederic Weisbecker , Mel Gorman , linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, megaraidlinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, storagedev@microchip.com, virtualization@lists.linux.dev, GR-QLogic-Storage-Upstream@marvell.com References: <20250110-isolcpus-io-queues-v5-0-0e4f118680b0@kernel.org> <20250110-isolcpus-io-queues-v5-7-0e4f118680b0@kernel.org> Content-Language: en-US From: Hannes Reinecke In-Reply-To: <20250110-isolcpus-io-queues-v5-7-0e4f118680b0@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; RCPT_COUNT_TWELVE(0.00)[23]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email,suse.de:mid] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250112_231313_617243_C0AD6672 X-CRM114-Status: GOOD ( 15.84 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 1/10/25 17:26, Daniel Wagner wrote: > When isolcpus=managed_irq is enabled all hardware queues should run on > the housekeeping CPUs only. Thus ignore the affinity mask provided by > the driver. Also we can't use blk_mq_map_queues because it will map all > CPUs to first hctx unless, the CPU is the same as the hctx has the > affinity set to, e.g. 8 CPUs with isolcpus=managed_irq,2-3,6-7 config > > queue mapping for /dev/nvme0n1 > hctx0: default 2 3 4 6 7 > hctx1: default 5 > hctx2: default 0 > hctx3: default 1 > > PCI name is 00:05.0: nvme0n1 > irq 57 affinity 0-1 effective 1 is_managed:0 nvme0q0 > irq 58 affinity 4 effective 4 is_managed:1 nvme0q1 > irq 59 affinity 5 effective 5 is_managed:1 nvme0q2 > irq 60 affinity 0 effective 0 is_managed:1 nvme0q3 > irq 61 affinity 1 effective 1 is_managed:1 nvme0q4 > > where as with blk_mq_hk_map_queues we get > > queue mapping for /dev/nvme0n1 > hctx0: default 2 4 > hctx1: default 3 5 > hctx2: default 0 6 > hctx3: default 1 7 > > PCI name is 00:05.0: nvme0n1 > irq 56 affinity 0-1 effective 1 is_managed:0 nvme0q0 > irq 61 affinity 4 effective 4 is_managed:1 nvme0q1 > irq 62 affinity 5 effective 5 is_managed:1 nvme0q2 > irq 63 affinity 0 effective 0 is_managed:1 nvme0q3 > irq 64 affinity 1 effective 1 is_managed:1 nvme0q4 > > Reviewed-by: Christoph Hellwig > Signed-off-by: Daniel Wagner > --- > block/blk-mq-cpumap.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 65 insertions(+) > Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich