From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 EBE482FD1C8 for ; Tue, 6 May 2025 03:18:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746501505; cv=none; b=bdJKOPzJ4gO6eKZFblxaoOJ+bJdBEKOvmnRHEETYj+Gb0sYS+5qTEwa7h34Dz2CN8QxV0Es4/MHblYW280R0ouJJ8ODk3+SNnB1+vgcwrTk+XwCFq3rgAlzavl6gSf39jGwMhEcQsWyEDiuSTwtgLHn3fwkQU1mlGKQBlWCXVV0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746501505; c=relaxed/simple; bh=hRLVacyamiMBXkbrXkozw5cwrH3nRoNQATSfeWPw/rE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=X4hUR+cpcUXPq9IovRhRtiJHp9rSgUasaJFcq+EmnzsmSD3NIu5R/Dp0/B8rEcMbyIrDt0G3/ey0Cm1lfPtxIg821waxf0RHTX74Cyoumbl76/2BE6kh5uCM366BDsfa+vuBKQp2lwSB2eTU3imv+H48Af6mdyHWbuQdqmGk80s= 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=cGHqq5Qg; arc=none smtp.client-ip=170.10.129.124 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="cGHqq5Qg" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1746501501; 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=sch28xP6WEwnIvUBxG3RgJ58EIQ3AtVfphEVYn+3Nl4=; b=cGHqq5QgNFyKMk/smC1OS6noyk5eg4ZzW6tlBUhWznP2oToaLlsvxPudXnwnUqEYkwjhtm QNFflW+RJr07wfAJiO71vtyzVRxhUK9woEPG93j6Vn8qL6BiZ2uXgHUaIM63+SwsmKF1Gv IGPOV/T28eo8iLCz7lDaPYyH3DE2oek= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-607-nA-B1ofkMX2faPg98ufcOw-1; Mon, 05 May 2025 23:18:18 -0400 X-MC-Unique: nA-B1ofkMX2faPg98ufcOw-1 X-Mimecast-MFC-AGG-ID: nA-B1ofkMX2faPg98ufcOw_1746501496 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id C8EC7180048E; Tue, 6 May 2025 03:18:15 +0000 (UTC) Received: from fedora (unknown [10.72.116.13]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 44F2A19560A3; Tue, 6 May 2025 03:18:02 +0000 (UTC) Date: Tue, 6 May 2025 11:17:58 +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 0/9] blk: honor isolcpus configuration Message-ID: References: <20250424-isolcpus-io-queues-v6-0-9a53a870ca1f@kernel.org> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev 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-v6-0-9a53a870ca1f@kernel.org> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 On Thu, Apr 24, 2025 at 08:19:39PM +0200, Daniel Wagner wrote: > I've added back the isolcpus io_queue agrument. This avoids any semantic > changes of managed_irq. IMO, this is correct thing to do. > I don't like it but I haven't found a > better way to deal with it. Ming clearly stated managed_irq should not > change. Precisely, we can't cause io hang and break existing managed_irq applications, especially you know there isn't kernel solution for it, same for v5, v6 or whatever. I will look at v6 this week. Thanks, Ming