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 413B64F207 for ; Tue, 26 Dec 2023 15:39:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none 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="NJUcXDWt" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1703605140; 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=wV/f9f0in7gn4gktkxuOHq7lnBTOjC718N9fK7Gr2Iw=; b=NJUcXDWtzZk/5joPmmoSG3Jg4IEqRHrVKvwHAxbynLmkJ0YLqZeYYecp84BI6m7CFR+fTu m4YW8w1OUnP9gQWWz9yj/cGXhB9gziG8m5ZQ7gxqf39MjemDnkJQU+PP22zabu9qrareix 7XrgLpPvBp6AUngKLvkaLZ6BXztY0dU= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-689-sixYqUSePx-65616kU37Mg-1; Tue, 26 Dec 2023 10:38:58 -0500 X-MC-Unique: sixYqUSePx-65616kU37Mg-1 Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-40d597040c9so6720335e9.1 for ; Tue, 26 Dec 2023 07:38:58 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703605137; x=1704209937; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=wV/f9f0in7gn4gktkxuOHq7lnBTOjC718N9fK7Gr2Iw=; b=QZyNxsyXu2YKAL5+ntI3K3Qk2BGsnnU8zhkviiW8u30T9K3whL+tEynVYt1SHTAKd6 whQHkm9qIrhFaOpD/6EK8udKInsEvR0smQEsA6eO7GcegGbLn4GAgKERgJFSjvuoQLSe a8msHG4FPZAY31P1jTe3DBz906+XZnLrLx9ayQhE7z0NHe9smiXuk1vuWEXKtkxazZLh EONHF4PoznQhQidVyBFeuRV1uU2nSzXDo/B8gb/LYxNY8lDqkik4yYMeDtE9dmmHq4U7 KRs3q7phxcfYBDeCdKiSYJ1T+XnFErfK7lNLhm0zpd0/kai9049oy54VY2kpDMCwWeZT wUHQ== X-Gm-Message-State: AOJu0Yw4NfXcpfTm3lJn9hHxU18CUX/zXlWolQCjsGYDhXWyLPRpZvmq yNRJKqe5G639DWtj/QJM2ktBh+aqgIETostZWv4PF8wow01O7oDb3ZczoYsuHe5k6RLydx6pEyI wDx8P/WZGvGitrZNuU9W8+8vW4VLAjl41 X-Received: by 2002:a05:600c:5405:b0:40d:2d25:b8ee with SMTP id he5-20020a05600c540500b0040d2d25b8eemr2051624wmb.171.1703605137304; Tue, 26 Dec 2023 07:38:57 -0800 (PST) X-Google-Smtp-Source: AGHT+IF95K6/sVk5zmbFYd7DofTvHL9+lGHyoYvlXR0NoGkiR28DSEG18rrqgMucy+nDqg7Ulg/sXg== X-Received: by 2002:a05:600c:5405:b0:40d:2d25:b8ee with SMTP id he5-20020a05600c540500b0040d2d25b8eemr2051613wmb.171.1703605136846; Tue, 26 Dec 2023 07:38:56 -0800 (PST) Received: from redhat.com ([2.55.177.189]) by smtp.gmail.com with ESMTPSA id l20-20020a05600c4f1400b003feae747ff2sm14254261wmq.35.2023.12.26.07.38.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Dec 2023 07:38:56 -0800 (PST) Date: Tue, 26 Dec 2023 10:38:52 -0500 From: "Michael S. Tsirkin" To: Li Feng Cc: Jens Axboe , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Xuan Zhuo , "open list:BLOCK LAYER" , linux-kernel , "open list:VIRTIO BLOCK AND SCSI DRIVERS" Subject: Re: [PATCH] virtio_blk: set the default scheduler to none Message-ID: <20231226103743-mutt-send-email-mst@kernel.org> References: <20231207043118.118158-1-fengli@smartx.com> <20231225092010-mutt-send-email-mst@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@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: On Tue, Dec 26, 2023 at 05:01:40PM +0800, Li Feng wrote: > I don't have ideas right now to answer Christoph/Paolo's question. Paolo did some testing on this thread and posted some concerns. Do you disagree with his analysis? -- MST