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mx.microsoft.com 1; spf=pass smtp.mailfrom=arm.com; dmarc=pass action=none header.from=arm.com; dkim=pass header.d=arm.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WtCUcluG2i0OOfOxFYabbi/hVb+K2lHtBjvpxI/FEiY=; b=bouSnlQxGmG/xxaruTw+Bz2G+eZ8sIqV6VGrsAwNT0fHS8znw2oxjS7KRErWy6ap3OI64dEbdlwoXwx5PlIapDCSuoe0+UR56G/CzVWip5KmL8IoRKvc6lIuNgqZjWu75HwPpvlBrsjchsdd3lEU3F3hsNPrfw8BjiWA+wirr2E= Authentication-Results-Original: suse.com; dkim=none (message not signed) header.d=none;suse.com; dmarc=none action=none header.from=arm.com; Content-Type: text/plain; charset=utf-8 Subject: Re: xen/evtchn: Dom0 boot hangs using preempt_rt kernel 5.10 From: Luca Fancellu In-Reply-To: Date: Mon, 22 Mar 2021 19:08:13 +0000 Cc: "xen-devel@lists.xenproject.org" Content-Transfer-Encoding: quoted-printable Message-Id: <2BC82A95-DFB9-4F90-8CC6-AE39405157ED@arm.com> References: <1FAD6C91-2B3A-48F0-88D7-CFCFC8B53BA9@arm.com> To: =?utf-8?B?SsO8cmdlbiBHcm/Dnw==?= X-Mailer: Apple Mail (2.3654.60.0.2.21) X-Originating-IP: [82.8.129.65] X-ClientProxiedBy: LO2P265CA0099.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:c::15) To VI1PR08MB3629.eurprd08.prod.outlook.com (2603:10a6:803:7f::25) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 0e195c13-154e-43a1-ef01-08d8ed65e55b X-MS-TrafficTypeDiagnostic: VE1PR08MB5069:|VI1PR0802MB2287: X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Oob-TLC-OOBClassifiers: OLM:10000;OLM:10000; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Mar 2021 19:08:36.7792 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0e195c13-154e-43a1-ef01-08d8ed65e55b X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM5EUR03FT015.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0802MB2287 Hi Juergen, Yes you are right it was my mistake, as you said to remove the BUG_ON(=E2= =80=A6) this serie (https://patchwork.kernel.org/project/xen-devel/cover/20= 210306161833.4552-1-jgross@suse.com/) is needed, since I=E2=80=99m using yo= cto I=E2=80=99m able to build a preempt_rt kernel up to the 5.10.23 and for= this reason I=E2=80=99m applying that serie on top of this version, then I= =E2=80=99m removing the BUG_ON(=E2=80=A6). A thing that was not expected is that now the Dom0 kernel is stuck on =E2= =80=9CSetting domain 0 name, domid and JSON config=E2=80=A6=E2=80=9D step a= nd the system seems unresponsive. Seems like a deadlock issue but looking i= nto the serie we can=E2=80=99t spot anything and that serie was also tested= by others from the community. Do you have any idea on that? Thank you for your time. > On 19 Mar 2021, at 11:54, J=C3=BCrgen Gro=C3=9F wrote: >=20 > On 19.03.21 12:50, Luca Fancellu wrote: >> Hi Juergen, >> Could you confirm that back porting this two serie to the linux kernel 5= .10: >> https://patchwork.kernel.org/project/xen-devel/cover/20201210192536.1184= 32146@linutronix.de/ >=20 > I don't see why this one would be needed? >=20 >> https://patchwork.kernel.org/project/xen-devel/cover/20210306161833.4552= -1-jgross@suse.com/ >=20 > This is already part of 5.10.24. >=20 >=20 > Juergen > Cheers, Luca=