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 ws5-mx01.kavi.com (ws5-mx01.kavi.com [34.193.7.191]) (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 5100DC61D85 for ; Tue, 21 Nov 2023 21:18:43 +0000 (UTC) Received: from lists.oasis-open.org (oasis.ws5.connectedcommunity.org [10.110.1.242]) by ws5-mx01.kavi.com (Postfix) with ESMTP id 8A1842AEE4 for ; Tue, 21 Nov 2023 21:18:42 +0000 (UTC) Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id 676E398689F for ; Tue, 21 Nov 2023 21:18:42 +0000 (UTC) Received: from host09.ws5.connectedcommunity.org (host09.ws5.connectedcommunity.org [10.110.1.97]) by lists.oasis-open.org (Postfix) with QMQP id 4C49E983CFD; Tue, 21 Nov 2023 21:18:42 +0000 (UTC) Mailing-List: contact virtio-comment-help@lists.oasis-open.org; run by ezmlm List-ID: Sender: Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id 3ED37986890 for ; Tue, 21 Nov 2023 21:18:42 +0000 (UTC) X-Virus-Scanned: amavisd-new at kavi.com X-MC-Unique: TzwxubOZOpeJKDMK4FEnKA-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700601485; x=1701206285; 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=y5gwAsRwvh/D4+v2Xs1/eg2B6G7Q1kyEg70edImpw4A=; b=i883FyXG/kkbCrUBM+7N+4inWcjrEFEgVevQBtUcibSh4NQ5CrOBWqGW2Ah76si0S2 XFaFb8ax7FYSxlxIWGUVbIQIra0Np0pb2D5zcHUHOjtvlK/5Qx9HI9QY5gAIOMWGqt0/ u9BzcgmeHxO4fK9eHbekJbWVZ3i+dAdI3EUHpSuhna4KLDjxse6roTnEjOYSOkIVtdeo b3noPlMBUdjNYSXnOP0xi6YT27AXR8p80UtgBy4AmzWWDU2yZy9iDUbGhDPuOzD4Fy9y k6GrLrIS+93lVA4dxbV+UoPaIGXTm3dgjjBoMTkhOxHEdWnR51jzSB42K0q38ZT+ZcSW py1w== X-Gm-Message-State: AOJu0YyE/GY6S2tQTU9OmRoprMcB8gvTaVr3Pqi5mRFokFIsoSadHlwh EBHrZ/p2ENGe8JxafXbB23WcunmRgYszWCU8UBOqo0b9btlmc8U8OPlckb+oNOWaLwiPUFu4syw tPdqL2btthDzMJ5sIYls+LjPsiUEJdfHpCg== X-Received: by 2002:a17:906:b212:b0:9be:e90:5016 with SMTP id p18-20020a170906b21200b009be0e905016mr97736ejz.24.1700601484784; Tue, 21 Nov 2023 13:18:04 -0800 (PST) X-Google-Smtp-Source: AGHT+IFd14hidU+zqY7KyQtRZySonqE+TQmLAYcrNNnE+pjPgvi9qzvlopQcCQ7T+lMEtlqhd2Uguw== X-Received: by 2002:a17:906:b212:b0:9be:e90:5016 with SMTP id p18-20020a170906b21200b009be0e905016mr97729ejz.24.1700601484425; Tue, 21 Nov 2023 13:18:04 -0800 (PST) Date: Tue, 21 Nov 2023 16:18:00 -0500 From: "Michael S. Tsirkin" To: Jason Wang Cc: Parav Pandit , "Zhu, Lingshan" , "eperezma@redhat.com" , "cohuck@redhat.com" , "stefanha@redhat.com" , "virtio-comment@lists.oasis-open.org" Message-ID: <20231121161218-mutt-send-email-mst@kernel.org> References: <20231106044836-mutt-send-email-mst@kernel.org> <20231108124625-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: Re: [virtio-comment] RE: [PATCH V2 3/6] virtio: dont reset vqs when SUSPEND On Tue, Nov 21, 2023 at 03:33:07PM +0800, Jason Wang wrote: > > Lingshan claimed that suspending device is for live migration in commit log and in discussion he portray it as some basic facility unrelated to device migration such as debug etc. > > Instead of claiming it as some non_device_migration facility does not make sense. > > It is used for migration for sure. Well having a generic facility to stop device sounds like a nice thing. However the devil is in the detail. A lot of detail here seems very much tailored to a very specific implementation in mind. So thinking through how it will work e.g. for power management would be a good excercise to figure out how it should work in detail. Parav did you indicate at some point a virtio specific SUSPEND bit can be useful for PM? Could you share how it's better than transport level PM and what the requirements are? Thanks! -- MST This publicly archived list offers a means to provide input to the OASIS Virtual I/O Device (VIRTIO) TC. In order to verify user consent to the Feedback License terms and to minimize spam in the list archive, subscription is required before posting. Subscribe: virtio-comment-subscribe@lists.oasis-open.org Unsubscribe: virtio-comment-unsubscribe@lists.oasis-open.org List help: virtio-comment-help@lists.oasis-open.org List archive: https://lists.oasis-open.org/archives/virtio-comment/ Feedback License: https://www.oasis-open.org/who/ipr/feedback_license.pdf List Guidelines: https://www.oasis-open.org/policies-guidelines/mailing-lists Committee: https://www.oasis-open.org/committees/virtio/ Join OASIS: https://www.oasis-open.org/join/