From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <010701a111ef001a-fcf80171-a466-4e39-8ee8-ebdb1b6fddf8-000000@eu-central-1.amazonses.com> Received: from AS8PR04CU009.outbound.protection.outlook.com (mail-westeuropeazon11021101.outbound.protection.outlook.com [52.101.70.101]) by lore.virtuozzo.com (Postfix) with ESMTPS id 4FC0E802A7 for ; Tue, 6 Oct 2026 15:57:27 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=qc6h2G6Ym0M2Y9rbWG6tLBjI6DkfFBVgrJfMwbqG3osQMI3mz5Sc+LTn2XfuRpxAP+tlyXEOE6NsVw9FiA1RSBvvh887sqehh7fGJit0g0azom7kChxgubftSFFlwaDUDK9YdUmkEIABYxj2/CizaBLH54CPtoWlHqYNoO42Ja9yDXgPL7Gsl0prPbxcL1dXy/YZ8xJow+pYXkcjSZ3Z8pax23hNrynn4mrU1Sng9b2tQX8uOzpesjzZ2fcXSBSV5oTmjHy+Kuj5zSEGfIRIegOsPF90I+xsoTTKw/znuykS3GNq2xuNyav9f7BqxVYvKnjpPgszqXjpoYloNLJB8Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=/+AExRtycZQUIzyRHe1M+h3+jzBFSBKQ68OWGQpe/zc=; b=LqqWKsgYYOVyucwGk4S1mULeOUzAMTWrmVayeGwBqbNtvyTPK6Nw8ztj8yTb+Sv34Tl6k6oAbUYJobYSiDMt4j9AO5jGxyezI7Z78bkUSY0URCOkavJEnWK3Gi9JLfcxvoeGLiWHE4YlR9rfR4HEy/h74RPhnUlapPJ3aBTnArQrQyuwoc4S/eF9/Khen1UDWOUSNQu/VH1mmRTQniBiQar4VyOWq6KnQbG3G4fS3hEyml1vR/9oqi+BoSzNloIBpix0ti5uFFb8+yDQ/CFmXF1+ZYMIPGeg0hN1DGvg9/pCYovm7d4k326xYuM/WV3G33iziCbjv+m8GG6k+NbHlQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 69.169.224.6) smtp.rcpttodomain=virtuozzo.com smtp.mailfrom=eu-central-1.amazonses.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=sashiko.virtuozzo.com; dkim=pass (signature was verified) header.d=sashiko.virtuozzo.com; dkim=pass (signature was verified) header.d=amazonses.com; arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=virtuozzo.onmicrosoft.com; s=selector2-virtuozzo-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=/+AExRtycZQUIzyRHe1M+h3+jzBFSBKQ68OWGQpe/zc=; b=hoTKkEg195fxnR0/gWs7i74Hu+9sw2Xfbtj9INHNlcSYEvYCDR9gUUDYqzUl6hbl0SCS1LGDON74HoYMjKSvZThCARy9iA5JTsOoOsTmUSFYZOM8yGz9glBXCYG7zAAz17TBAw0E+QBaIcYP1o3eLGy453eLICrt1BpM8rBekk4= Received: from VIVP296CA0046.AUTP296.PROD.OUTLOOK.COM (2603:10a6:800:353::19) by PAVPR08MB8895.eurprd08.prod.outlook.com (2603:10a6:102:323::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.496.14; Tue, 6 Oct 2026 15:57:20 +0000 Received: from ZR1PEPF0000E6AE.eurprd05.prod.outlook.com (2603:10a6:800:353:cafe::ae) by VIVP296CA0046.outlook.office365.com (2603:10a6:800:353::19) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.472.21 via Frontend Transport; Tue, 6 Oct 2026 15:57:18 +0000 Authentication-Results: mx.microsoft.com 1; spf=pass (sender IP is 69.169.224.6) smtp.mailfrom=eu-central-1.amazonses.com; dkim=pass (signature was verified) header.d=sashiko.virtuozzo.com;dkim=pass (signature was verified) header.d=amazonses.com;dmarc=pass action=none header.from=sashiko.virtuozzo.com; Received-SPF: Pass (protection.outlook.com: domain of eu-central-1.amazonses.com designates 69.169.224.6 as permitted sender) receiver=protection.outlook.com; client-ip=69.169.224.6; helo=b224-6.smtp-out.eu-central-1.amazonses.com; pr=C Received: from b224-6.smtp-out.eu-central-1.amazonses.com (69.169.224.6) by ZR1PEPF0000E6AE.mail.protection.outlook.com (10.167.241.85) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.496.14 via Frontend Transport; Tue, 6 Oct 2026 15:57:18 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=23yjbh4k34hwzfubhuiim7m4inbd3ick; d=sashiko.virtuozzo.com; t=1791302238; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date:Message-ID; bh=a1PP9ZiBz/P0YwHirYR5ShTL/IxLfFWCP1a/A6cFy5Y=; b=lrGTkqykssECQzLjo6FAwE9GOhgx5OpDgv+jre3Q8NOZ/5Lf+DM3KshALbjQj4MN cMAWng0cdyL0F4uDm9LGjUacJZnwh6IXfrbKzOHiBmkqdqDgAEaWetkA/YN7Zq+jAcM xBA7V1KoNwhM/J/ns2qDNPgU+N1hNKxFAMqhP+uv9BuhxQcr88NCvo3Shhlo5J5Wv7g cEm3LoW0ZejKEx8mlDoQ/3kQuO1N4TpTky4dRTgzlMImVGqb0AEhZGBySVQQTm2v37R mv8NcnloclIQnbol6rkzjzd6lAlwm2uWT4SZ74Q/6gkwTRwxbF88uhElUyUQhCRjaFM 4nY+n/iD7g== DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=sokbgaaqhfgd6qjht2wmdajpuuanpimv; d=amazonses.com; t=1791302238; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date:Message-ID:Feedback-ID; bh=a1PP9ZiBz/P0YwHirYR5ShTL/IxLfFWCP1a/A6cFy5Y=; b=RuiqE39EgPAoMAZZNNjItG2aPqny/JUZPAekdeQGyvw7D3AY7VtRPARahlCZ15xS ezDZTRbatAxnKn6ySCKipMfKoypbL1gBHftrVOaVipeDSx97HCMwMxssQxIFgKNWj0C as5hTZGFCIOWbfcZ+p3suEqUdUgpiWGIqIfRUbOE= From: no-reply@sashiko.virtuozzo.com Subject: Re: [PATCH QEMU HCI-8.0 v7 14/14] usb-host: make CPR migration blocker conditional #VSTOR-137800 To: svt-core@virtuozzo.com, Andrey Drobyshev Cc: den@openvz.org, andrey.drobyshev@virtuozzo.com In-Reply-To: <20261006-usb-host_v3-v7-14-044f668789a1@virtuozzo.com> References: <20261006-usb-host_v3-v7-0-044f668789a1@virtuozzo.com> <20261006-usb-host_v3-v7-14-044f668789a1@virtuozzo.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 6 Oct 2026 15:57:18 +0000 Message-ID: <010701a111ef001a-fcf80171-a466-4e39-8ee8-ebdb1b6fddf8-000000@eu-central-1.amazonses.com> Feedback-ID: ::1.eu-central-1.2wRQJBpg9g1fGRYexx3dUuYGS25Bux+2TEOx72/m6U4=:AmazonSES X-SES-Outgoing: 2026.10.06-69.169.224.6 X-EOPAttributedMessage: 0 X-EOPTenantAttributedMessage: 0bc7f26d-0264-416e-a6fc-8352af79c58f:0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: ZR1PEPF0000E6AE:EE_|PAVPR08MB8895:EE_ MIME-Version: 1.0 X-MS-Office365-Filtering-Correlation-Id: 1a52f46c-b9d2-44b1-9acf-08df23c27ff2 X-LD-Processed: 0bc7f26d-0264-416e-a6fc-8352af79c58f,ExtAddr X-MS-Exchange-AtpMessageProperties: SA List-Id: svt-core@virtuozzo.com X-MS-Exchange-Transport-Rules-Loop: 1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|32142699015|48200799018|9140799003|61400799027|18002099003|13003099007|16102099003|22082099003|55112099003|6133799003|4113699003|5113699003|4143699003|5063699009|56012099006|10067099003; X-Microsoft-Antispam-Message-Info: =?utf-8?B?SmMwUmdMejBYSUF5RGlwcS9lcWR2RE5YdUU1dC93dHJDNjYzQm9WK3F6MnU3?= =?utf-8?B?a0JEMENLOXhSUUd4S3A0RG1RcHI4NXdxV1BKVTRRK2ZLSmtUYVlIZDR2YWRD?= =?utf-8?B?VTR4TmM3WDFzamJBUEphQVRUa0tjL2JZaDVPUmtJeENkcFFmV2xDOUcveXdP?= =?utf-8?B?U0NRODhlTHZEYlVyNXQwd3lPQ0pVOWsvR1NMVlUrZm9KQ2V5Mk9TTVpyc2xt?= =?utf-8?B?TlVGM051N1RjMmdUM2NWaDFhRld5ckpBSTRqcjNCUVpLZERoVkJuMlE5UDA0?= =?utf-8?B?Z1k3eWQ0YXNxTHQ1M0ZncllXSXB6SkthTG5KVm1YVXczWjFKR0psVVdLTEhR?= =?utf-8?B?QzEzV09DeWxKR0tIWXVURE1GUUcxVU1YV2hERkxzWVIzVVNJU1lGajRoZCtZ?= =?utf-8?B?eGw0dHhHVWtINGFKRlEyby9mZUdWdU9iQ2hJbE80Vk1EdkJHYUp6OC91WTNZ?= =?utf-8?B?bnlTOTdyc0NFT1h6QzA2Q3pRWjFXcnBSSy83QzFpbmZ2Yk9ENFl6Y2c2TWs1?= =?utf-8?B?aDY0SWV2MllQUEY3YkRhZnBrZ3pwaWpIMFUwWjgybmNHNy8yTkZoQXFPVi9s?= =?utf-8?B?clh0ZGIvTmo3ZWwycVppMU1FcmMvbXFLVE9oODBEeWd2dllnTDRTeHVsa1N3?= =?utf-8?B?aHpua3c2SjZ2Yi9QNjRWMXk4YXpUWnVvc1NaYUNpdkRzQmxFK0JjMitHcWF4?= =?utf-8?B?QVg3bnVNK2dJUmxZS0lZZ2ZXaUhvdGppQkRhQjR3d1d6dDVXakZYRmU3ei9Y?= =?utf-8?B?cEhkQ2l0WDQ5ZDRtVkp1UGtRVnRrSUpsdkp6aVhOeWpERTBiZG9ON3ZBNnVZ?= =?utf-8?B?M3dZdzUzK1Z4eHVmMGVldlR4RWRHblhSVHlOcEVLREU1bjRWT3ZzTmxKN0d0?= =?utf-8?B?aUtlRzltUXhLWHU4b0NaVnFzUVFhN2VGYkp4dmFjYURzM1BYUi9NSk1kQ0M0?= =?utf-8?B?S1lBSjdOUTlmTDJNSlNEQ1Q0U3VxazN6aGhKdXVRWXJjMkpTelVVaWdqMDdQ?= =?utf-8?B?TlJHdk5JQ0ZyVmdDMDRYYW9USVY4VWo3aVNHVy84SWoyakM0Z0d5eGVBd0lm?= =?utf-8?B?STRWdUUyaFVzMjlFcnRmN2QrcGl2bkxmREpUOW9neWsvL0hFZzc0K1BLR1JH?= =?utf-8?B?VEw1UHdmZFJwSkNxM2czTjIrNmQyVGhJQ0F2Y2lsVm96encrL2RMN3BYV0p2?= =?utf-8?B?QlNFc0lnTEtxb0c3QUxHVlN3c2tWbWJIeXhVcWFkT2krNjNpalNlOVREVFp2?= =?utf-8?B?K3dOM3lwK3ZtVUVNeDFCdW13K0g1aE9hOGhWRlhmRTNiOU9tdz09?= X-Forefront-Antispam-Report: CIP:69.169.224.6;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:b224-6.smtp-out.eu-central-1.amazonses.com;PTR:b224-6.smtp-out.eu-central-1.amazonses.com;CAT:NONE;SFS:(13230040)(376014)(32142699015)(48200799018)(9140799003)(61400799027)(18002099003)(13003099007)(16102099003)(22082099003)(55112099003)(6133799003)(4113699003)(5113699003)(4143699003)(5063699009)(56012099006)(10067099003);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: PcPkoMf4Jf22RSyM5VxRp00v4XWBm7L23x3OGS8UbHRP483jDsCrfJ+wMPfXDiSOsR5qT0RH9gbmqmwtz3r/0xA5n1k+pNd1Ab6ESu13Hy6EF+ILKzlWm4T5SnzreDoB1QNYc85iUzjz8ftTbC/F4aegjf9UtenMkdUNEE216nuzRZ6bYFRNwMW7qzQKP8TbxKi4FlmbWudsWIn3yVG8cNAgIVnyxNO95klobPXRrGapwN1NV6TWZMR5f1A1oQ0yBQZK4QkOVWEPuiEZRTVBeCi0/q1aAEKwHDTM6nAACEgGCdtySs9XgRqYLoUX7u189nOsvnO/6xOTD/7I2vfODJqpsmBW62hvvkD1OOIkwKvuLQU+zyZdf0EjYaVclA4iI+I/ragZKoMcFYSjOhCIvpFi7NM2t0IgCeb+afIooByDaFQbnnAzqyue8xhzm7w6 X-ExternalRecipientOutboundConnectors: 0bc7f26d-0264-416e-a6fc-8352af79c58f X-OriginatorOrg: virtuozzo.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Oct 2026 15:57:18.6432 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1a52f46c-b9d2-44b1-9acf-08df23c27ff2 X-MS-Exchange-CrossTenant-Id: 0bc7f26d-0264-416e-a6fc-8352af79c58f X-MS-Exchange-CrossTenant-AuthSource: ZR1PEPF0000E6AE.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: Internet X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAVPR08MB8895 > A previous commit added an unconditional blocker for CPR migrations. > That is to refuse CPR gracefully instead of crashing and for the previous > commits to remain bisectable. >=20 > Now the restore path is complete: the FD is preserved, in-flight URBs > are drained and replayed, the device is handed off across cpr-transfer, > and the endpoints and isochronous streams are reconstructed on the > target. So let's lift the CPR blocker for the devices which satisfy the > preconditions. >=20 > Still, the remaining preconditions for CPR to work are: >=20 > * We must open host device FD ourselves, so that libusb owns the FD. > This way we're able to preserve the FD during CPR; > * Device ID must be provided as a unique stable key for CPR FD registry. >=20 > Use them to guard the blocker addition. Apart from that, prohibit CPR on > WIN32 platform and on hosts with older libusb versions. >=20 > Signed-off-by: Andrey Drobyshev Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.vzint.dev/#/patchset/20261006-usb-= host_v3-v7-0-044f668789a1@virtuozzo.com?part=3D14