Messages in this thread | | | Date | Thu, 23 Mar 2017 10:40:22 +0100 | From | Peter Zijlstra <> | Subject | Re: perf_callchain_user oops |
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On Wed, Mar 22, 2017 at 10:58:04PM -0400, Dave Jones wrote: > Not seen this one before.. > > Oops: 0002 [#1] PREEMPT SMP DEBUG_PAGEALLOC
That's a write fault reaching no_context() afaict.
> CPU: 1 PID: 24420 Comm: trinity-main Not tainted 4.11.0-rc3-think+ #3 > task: ffff8804f4c85440 task.stack: ffffc90001d38000 > RIP: 0010:perf_callchain_user+0x11e/0x220 > RSP: 0000:ffffc90001d3ba98 EFLAGS: 00010246 > RAX: ffff88044c59c2a8 RBX: ffffc90001d3bae8 RCX: 0000562bce3f6e40 > RDX: 0000562bce3f6e40 RSI: 00007fffffffeff0 RDI: 0000000000000000 > RBP: ffffc90001d3bab8 R08: 00000000bffffff0 R09: 00000000ffffdff0 > R10: 0000000000002faa R11: 0000000000002fab R12: ffff8804f4c85440 > R13: ffffc90001d3bf58 R14: ffffc90001d3bf58 R15: 0000000000000000 > FS: 00007f34b3969b40(0000) GS:ffff880507a00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffff88044c5b4000 CR3: 000000044c584000 CR4: 00000000001406e0 > DR0: 00007f34b382e000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 > Call Trace: > get_perf_callchain+0x258/0x2b0 > perf_callchain+0x79/0x80 > perf_prepare_sample+0x27e/0x360 > perf_event_output_forward+0x75/0x160
Any chance you could run scripts/faddr2line on this output?
I cannot seem to match the Code with a defconfig build of that function.
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