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Wed, 6 Aug 2025 08:35:59 +0000 Date: Wed, 6 Aug 2025 16:35:48 +0800 From: Oliver Sang To: Thomas Gleixner CC: Peter Zijlstra , , , , , "Sebastian Andrzej Siewior" , , , Subject: Re: [tip:locking/futex] [futex] 56180dd20c: BUG:sleeping_function_called_from_invalid_context_at_kernel/nsproxy.c Message-ID: References: <87a54usty4.ffs@tglx> <87seikp94v.ffs@tglx> <87wm7ro3r7.ffs@tglx> <87cy9gilo8.ffs@tglx> <874iusihka.ffs@tglx> <87qzxoeuav.ffs@tglx> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <87qzxoeuav.ffs@tglx> X-ClientProxiedBy: SG2P153CA0019.APCP153.PROD.OUTLOOK.COM (2603:1096:4:c7::6) To LV3PR11MB8603.namprd11.prod.outlook.com (2603:10b6:408:1b6::9) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV3PR11MB8603:EE_|LV3PR11MB8482:EE_ X-MS-Office365-Filtering-Correlation-Id: 90c1a82d-7c28-482e-7bd7-08ddd4c444e0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|366016; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?4BbPy3P4pi9W0s3OCuEONEy+gNs5DvmGqH7Jbd9ujaYo5oK3tUabVsxvWQYQ?= =?us-ascii?Q?zPnjGQhv1csXP5fOUTc0NrBicHje3AZsp3sEOoCOUvJ08FBUtw5l1uAD/lzC?= =?us-ascii?Q?19Z8at6WjzQmnEfkLVivVzIuINK8YDbHQ4RxgoAEvdvs+mBDQ984iWa0Ue5i?= =?us-ascii?Q?h1S3tZxia/yEZhIL+NTt/r9Vg9+F4y5bavepJZ93KFjBkYoqt7I5r7GAWQpB?= =?us-ascii?Q?XDwWCUm9IiCas3HSe0enUEFmYo9+wBmjUJvb2n91lNdxBYGkgIxiDg/a1l3o?= =?us-ascii?Q?nr/hQqEF/ISp0Ud/IutYJWrm6TdSru7ECHRJYrLF9t6/9EA0p8QQh7vMsu/d?= =?us-ascii?Q?8ngckceYBAdoqpTOVblAPWCnKO37/yL5hUHltYwk2nzLgRNvJp+qVR5AeD17?= =?us-ascii?Q?jKTYyr4oldWuZiOZ8y0A8aMWxnO5cTzClYZYMyQlz1FaU5OhjACcmEftnciz?= =?us-ascii?Q?QVo7yZ+FpyxdIQ57ZkFKTin+eApbx++BIuk2Xu8Y+A6MYKISrkk8WZJDrdCs?= =?us-ascii?Q?hEityioKBftlb279ewDS56DZp/Eytwp97SKQtUHme9AfnXP1fQkyJ1WkQXb6?= =?us-ascii?Q?Q1KnfAOAtXBMEhoh0Blxo+VvT/jlhF5UfTn6kHMdSPEPkTe1Tik04c/cykiJ?= =?us-ascii?Q?ctR1G95oi0cJEtUs9WGfNRFy7eBF0by9Idv3dB0IHtt2AhO0Rzxdd0Vh2OqL?= =?us-ascii?Q?0lE1+NwY4J6RePQ6UVjfqS0H4fOtAR/EovTsCjop4NSZvzhZ42rDMWCIT2/l?= =?us-ascii?Q?yFBNRNCrogFoBGISaPuOx03MAG3xnMCFDPieT+VJN6P3jAUsEZKo2xvCwzxR?= =?us-ascii?Q?JDqXBgGj0LSdsAGBOm03dfHUIDldQf2Eyq7/G791RFjKgzoWwZtX0kRyMjI1?= =?us-ascii?Q?UbH3s9ojdGyWe2IUAO+UGHzJlvfk+3Nm2wRIBbVF/CQ9y6FM11dWndyJUwQK?= =?us-ascii?Q?qTbt8H0FeBbsVA/5dItkUb2KcxxAYTttzHY/7U0OE0hMC5Og312UVP0kSKmu?= =?us-ascii?Q?01ScsVBQJw+2TWorZnG9OYlbgPLKif73a5YxBlye3lKwQWywzPsuOoh4CMGz?= =?us-ascii?Q?cpG2+3ZUiF9/1bkjRX1q+QymYd0bkiv52thuGCUvJilxh6LLYmUv0b7Plm+f?= =?us-ascii?Q?nGGPQhaHTV/86Esg9v2eTkm9+8GERKMOSj/AmzkHBY8Ly5iQU44pYSvLzHwN?= =?us-ascii?Q?UIehUIl7VKJs9rkehU+ze05VfzNF8fnN+7Yza6bv9m+vEersiWoqpCDX4Iqe?= =?us-ascii?Q?uEhd5CHWYTyH8oYm3k3+5GT35UT/Cvsttf1KNLmOgq5hVPPIVYc2gpCXRB7S?= =?us-ascii?Q?LEmKN5T0d6nrX21atFbBAyhwN8hRfZa9wKLp3Dw2mjgCh6luemRMhPbmqDC6?= =?us-ascii?Q?UGe6sSdS61OZxWAUl5RNg/vV/5aRnClzKE3SyyY059o4/LKaYzbRD9hguTHb?= =?us-ascii?Q?crWLhDxcUa1wEmOMvMvzl/cWL48ZW0tgjDQf+VuOlD9L4vxERcnJyNOgujvt?= =?us-ascii?Q?etKrlXV/zj/oEANcVDQ2WVVTVa4i6leRKA+3PrDdzKxOihrIP1O2088zpX+f?= =?us-ascii?Q?UYghKyajdPXmpIawvdXx6Yj66FHFwBy9TFRTgn/WRxbeSCw4kYMjWUvbRPEl?= =?us-ascii?Q?kQ=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: 90c1a82d-7c28-482e-7bd7-08ddd4c444e0 X-MS-Exchange-CrossTenant-AuthSource: LV3PR11MB8603.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Aug 2025 08:35:59.2016 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: vf7rQGEsKW5mi5mBCv7OkTMtiBOcA4LqOWXoH/VBS/arjjbvSMpnXyi7xcg7F1vinlzRXEexkimjuRYlJdiGIQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR11MB8482 X-OriginatorOrg: intel.com On Wed, Aug 06, 2025 at 10:19:36AM +0200, Thomas Gleixner wrote: > Oliver! > > On Wed, Aug 06 2025 at 16:01, Oliver Sang wrote: > > On Thu, Jul 31, 2025 at 04:03:01PM +0200, Thomas Gleixner wrote: > >> On Thu, Jul 31 2025 at 14:34, Thomas Gleixner wrote: > >> > Either you make the timeout longer or try the following on the kernel > >> > command line instead of 'ftrace_dump_on_cpu': > >> > >> instead of 'ftrace_dump_ooops' > > > > sorry for late, I just took several-day off. > > I hope you had a good time! > > > attached dmesg FYI. > > Thanks for doing this. Now the buffer is too short and as nothing stops > the tracer the interesting stuff goes out of sight. > > Can you please apply the patch below and try again? got it! just want to confirm, still use below params or need some modification? trace_event=preemptirq:preempt_disable,preemptirq:preempt_enable ftrace_dump_on_oops=orig_cpu trace_buf_size=100K panic_on_warn=1 > > Thanks, > > tglx > --- > --- a/kernel/sched/core.c > +++ b/kernel/sched/core.c > @@ -5850,6 +5850,8 @@ void preempt_count_sub(int val) > /* > * Underflow? > */ > + if (val > preempt_count()) > + tracing_off(); > if (DEBUG_LOCKS_WARN_ON(val > preempt_count())) > return; > /*