From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A35D213632B for ; Fri, 9 May 2025 01:47:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746755279; cv=none; b=qSMyg+w3fWxCBg3pCZ4+HiFU3nQh6Wp2PVwYPCncvYNN8sibMQc7+0PGVdmGQzKGp5d6aGvFrqWXtk4LAfod6/qu1UU4qLKk3N8kwy7MboEzdZTU27uciMr4QKr3gVQt5i9c3cdl/FW0aZEFSvGEKxT+0m+yB2ykPhqvCeT0pIA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746755279; c=relaxed/simple; bh=wQLJy9Qh5QOD9K8pmPnScaOgCjMtssjlSOcdbdhHXNo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WvKKMq/jH+m55dx4juotNWYtnuuj7ct5bFCLywvKo/kCDhd6GW4Sp6Tu6DTUTL/PrnueJIKbtiZaHEoqRnFduvfNcaxlI0iPH6RrGmdp5Ess5mvFpZlotzzpDOlpGtHsAHHWHt4A/4lVPV7w4CAvz6vqGtBOoClSB/cErAA+CSQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Eajq+VnR; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Eajq+VnR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1746755276; h=from:from:reply-to:subject:subject: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=MpLET85xvvawA9Cb+7wJCp6SaHgcQvrJdv4KKKiwq+c=; b=Eajq+VnRHQKpuZsrXFndhOTrSpK3K5q4w8CLFq7FuHN2uEEmZU7riKublI4cQnbkNAMriD ZcPGaUZNB+OsRrs7Pkb5YBaygE9Ty+eYFouf2TMsJN2XF3qichTtpBI/Xu0a7mL/c1cxvy nCfnWRr9EqzGomOBjK7sQN2GCQ5n6/Y= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-226-bDcLcTtrM-2ea5CWOlKyag-1; Thu, 08 May 2025 21:47:54 -0400 X-MC-Unique: bDcLcTtrM-2ea5CWOlKyag-1 X-Mimecast-MFC-AGG-ID: bDcLcTtrM-2ea5CWOlKyag_1746755269 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id CE6AB1956087; Fri, 9 May 2025 01:47:48 +0000 (UTC) Received: from fedora (unknown [10.72.116.120]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 2E5601956055; Fri, 9 May 2025 01:47:35 +0000 (UTC) Date: Fri, 9 May 2025 09:47:31 +0800 From: Ming Lei To: Daniel Wagner Cc: Jens Axboe , Keith Busch , Christoph Hellwig , Sagi Grimberg , "Michael S. Tsirkin" , "Martin K. Petersen" , Thomas Gleixner , Costa Shulyupin , Juri Lelli , Valentin Schneider , Waiman Long , Frederic Weisbecker , Mel Gorman , Hannes Reinecke , Mathieu Desnoyers , 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 Subject: Re: [PATCH v6 3/9] nvme-pci: use block layer helpers to calculate num of queues Message-ID: References: <20250424-isolcpus-io-queues-v6-0-9a53a870ca1f@kernel.org> <20250424-isolcpus-io-queues-v6-3-9a53a870ca1f@kernel.org> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250424-isolcpus-io-queues-v6-3-9a53a870ca1f@kernel.org> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 On Thu, Apr 24, 2025 at 08:19:42PM +0200, Daniel Wagner wrote: > Multiqueue devices should only allocate queues for the housekeeping CPUs > when isolcpus=io_queue is set. This avoids that the isolated CPUs get > disturbed with OS workload. The commit log needs to be updated: - io_queue isn't introduced yet - this patch can only reduce nr_hw_queues, and queue mapping isn't changed yet, so nothing to do with "This avoids that the isolated CPUs get disturbed with OS workload" Thanks, Ming