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Thu, 21 Oct 2021 10:39:15 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.112.34) smtp.mailfrom=nvidia.com; vger.kernel.org; dkim=none (message not signed) header.d=none;vger.kernel.org; dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.112.34 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.112.34; helo=mail.nvidia.com; Received: from mail.nvidia.com (216.228.112.34) by BN8NAM11FT019.mail.protection.outlook.com (10.13.176.158) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.4628.16 via Frontend Transport; Thu, 21 Oct 2021 10:39:15 +0000 Received: from [172.27.15.75] (172.20.187.6) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Thu, 21 Oct 2021 10:39:10 +0000 Subject: Re: [PATCH V2 mlx5-next 14/14] vfio/mlx5: Use its own PCI reset_done error handler To: Alex Williamson , Jason Gunthorpe CC: , , , , , , , , , References: <20211019105838.227569-1-yishaih@nvidia.com> <20211019105838.227569-15-yishaih@nvidia.com> <20211019125513.4e522af9.alex.williamson@redhat.com> <20211019191025.GA4072278@nvidia.com> <5cf3fb6c-2ca0-f54e-3a05-27762d29b8e2@nvidia.com> <20211020164629.GG2744544@nvidia.com> <20211020114514.560ce2fa.alex.williamson@redhat.com> From: Yishai Hadas Message-ID: <36fffe2a-cc37-7f65-1a99-558d24fce837@nvidia.com> Date: Thu, 21 Oct 2021 13:39:06 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Oct 2021 10:39:15.3496 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a593dd90-5666-45d8-29b4-08d9947f079d X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.34];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT019.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB3890 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 10/20/2021 8:45 PM, Alex Williamson wrote: > However, regardless of the migration recovery strategy, userspace needs > a means to get the device back into an initial state in a deterministic > way without closing and re-opening the device (or polling for an > arbitrary length of time). That's the minimum viable product here. > Thanks, > > Alex > OK, in V3 I'll use the algorithm that Jason has suggested in this mail thread to let things be done in a deterministic way without using a WQ. Thanks, Yishai