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header.from=amd.com; Received: from LV8PR12MB9207.namprd12.prod.outlook.com (2603:10b6:408:187::15) by IA0PR12MB7675.namprd12.prod.outlook.com (2603:10b6:208:433::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8158.24; Thu, 21 Nov 2024 15:58:37 +0000 Received: from LV8PR12MB9207.namprd12.prod.outlook.com ([fe80::3a37:4bf4:a21:87d9]) by LV8PR12MB9207.namprd12.prod.outlook.com ([fe80::3a37:4bf4:a21:87d9%3]) with mapi id 15.20.8158.023; Thu, 21 Nov 2024 15:58:37 +0000 Message-ID: <76af0bc2-fecf-4f5b-8c52-924f49ac9b7a@amd.com> Date: Thu, 21 Nov 2024 21:28:29 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 10/10] perf/x86/rapl: Add core energy counter support for AMD CPUs To: Peter Jung , peterz@infradead.org, mingo@redhat.com, rui.zhang@intel.com, irogers@google.com, kan.liang@linux.intel.com, tglx@linutronix.de, bp@alien8.dei, gautham.shenoy@amd.com Cc: kprateek.nayak@amd.com, ravi.bangoria@amd.com, x86@kernel.org, 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On 11/20/2024 8:00 PM, Peter Jung wrote: > Hi Dhananjay, > > On 20.11.24 14:58, Dhananjay Ugwekar wrote: >> Hello Peter Jung, >> >> Thanks for trying out the patchset, >> >> On 11/20/2024 1:28 PM, Peter Jung wrote: >>> Hi together, >>> >>> This patch seems to crash the kernel  and results into a not bootable system. >>> >>> >>> The patch has been applied on base 6.12.rc7 - I have not tested it yet on linux-next. >>> >>> I was able to reproduce this issue also on the v6 and the only "good" version was the v4. >>> This has been reproduced on several zen3+ machines and also on my 9950X. >>> >>> Bisect log: >>> ``` >>> git bisect start >>> # status: waiting for both good and bad commits >>> # good: [2d5404caa8c7bb5c4e0435f94b28834ae5456623] Linux 6.12-rc7 >>> git bisect good 2d5404caa8c7bb5c4e0435f94b28834ae5456623 >>> # status: waiting for bad commit, 1 good commit known >>> # bad: [372e95a40e04ae6ebe69300b76566af6455ba84e] perf/x86/rapl: Add core energy counter support for AMD CPUs >>> git bisect bad 372e95a40e04ae6ebe69300b76566af6455ba84e >>> # good: [fd3c84b2fc8a50030e8c7d91983f50539035ec3a] perf/x86/rapl: Rename rapl_pmu variables >>> git bisect good fd3c84b2fc8a50030e8c7d91983f50539035ec3a >>> # good: [96673b2c940e71fde50a54311ecdce00ff7a8e0b] perf/x86/rapl: Modify the generic variable names to *_pkg* >>> git bisect good 96673b2c940e71fde50a54311ecdce00ff7a8e0b >>> # good: [68b214c92635f0b24a3f3074873b77f4f1a82b80] perf/x86/rapl: Move the cntr_mask to rapl_pmus struct >>> git bisect good 68b214c92635f0b24a3f3074873b77f4f1a82b80 >>> # first bad commit: [372e95a40e04ae6ebe69300b76566af6455ba84e] perf/x86/rapl: Add core energy counter support for AMD CPUs >>> ``` >>> >>> Nov 17 12:17:37 varvalian kernel: RIP: 0010:internal_create_group+0x9a/0x4e0 >>> Nov 17 12:17:37 varvalian kernel: Code: 7b 20 00 0f 84 cb 00 00 00 48 8d 74 24 1c 48 8d 54 24 18 4c 89 ff e8 15 8a 99 00 48 83 3b 00 74 59 48 8b 43 18 48 85 c0 74 11 <48> 8b 30 48 85 f6 74 09 4c 8b 5b 08 4d 85 db 75 1a 48 8b 43 20 48 >>> Nov 17 12:17:37 varvalian kernel: RSP: 0018:ffffaa5281fe7868 EFLAGS: 00010202 >>> Nov 17 12:17:37 varvalian kernel: RAX: 796772656e650073 RBX: ffffffffc2a642aa RCX: f781ec27a963db00 >>> Nov 17 12:17:37 varvalian kernel: RDX: ffffaa5281fe7880 RSI: ffffaa5281fe7884 RDI: ffff90c611dc8400 >>> Nov 17 12:17:37 varvalian kernel: RBP: 000000000000000f R08: 0000000000000000 R09: 0000000000000001 >>> Nov 17 12:17:37 varvalian kernel: R10: 0000000002000001 R11: ffffffff8e86ee00 R12: 0000000000000000 >>> Nov 17 12:17:37 varvalian kernel: R13: ffff90c6038469c0 R14: ffff90c611dc8400 R15: ffff90c611dc8400 >>> Nov 17 12:17:37 varvalian kernel: FS:  00007163efc54880(0000) GS:ffff90c8efe00000(0000) knlGS:0000000000000000 >>> Nov 17 12:17:37 varvalian kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >>> Nov 17 12:17:37 varvalian kernel: CR2: 00005c1834b98298 CR3: 0000000121298000 CR4: 0000000000f50ef0 >>> Nov 17 12:17:37 varvalian kernel: PKRU: 55555554 >>> Nov 17 12:17:47 varvalian kernel: ------------[ cut here ]------------ >>> ``` >>> >>> Ill do on the weekend some additonal tests based on the latest linux-next snapshot and provide some more logs. >> Can you please try with the below diff once, >> >> diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c >> index e9be1f31163d..d3bb3865c1b1 100644 >> --- a/arch/x86/events/rapl.c >> +++ b/arch/x86/events/rapl.c >> @@ -699,6 +699,7 @@ static const struct attribute_group *rapl_attr_update[] = { >> >>   static const struct attribute_group *rapl_core_attr_update[] = { >>          &rapl_events_core_group, >> +       NULL, >>   }; >> >>   static int __init init_rapl_pmu(struct rapl_pmus *rapl_pmus) >> >> Regards, >> Dhananjay >> > > > Thanks! This patch appears to fix the issue, when the kernel is built with clang. Thanks for providing such fast fix! :) Great!, Thanks for the confirmation. Regards, Dhananjay > > Peter > > >>> Regards, >>> >>> Peter >