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Date: Mon, 16 Oct 2017 16:10:07 +0300 From: Petri Latvala <petri.latvala@...el.com> To: Thomas Gleixner <tglx@...utronix.de> Cc: Yu Chen <yu.c.chen@...el.com>, Juergen Gross <jgross@...e.com>, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Tony Luck <tony.luck@...el.com>, Marc Zyngier <marc.zyngier@....com>, Alok Kataria <akataria@...are.com>, Joerg Roedel <joro@...tes.org>, "Rafael J. Wysocki" <rjw@...ysocki.net>, Steven Rostedt <rostedt@...dmis.org>, Christoph Hellwig <hch@....de>, Peter Zijlstra <peterz@...radead.org>, Borislav Petkov <bp@...en8.de>, Paolo Bonzini <pbonzini@...hat.com>, Rui Zhang <rui.zhang@...el.com>, "K. Y. Srinivasan" <kys@...rosoft.com>, Arjan van de Ven <arjan@...ux.intel.com>, Dan Williams <dan.j.williams@...el.com>, Len Brown <lenb@...nel.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: Regression in linux-next On 10/16/2017 03:54 PM, Thomas Gleixner wrote: > On Mon, 16 Oct 2017, Thomas Gleixner wrote: >> On Mon, 16 Oct 2017, Petri Latvala wrote: >>>> That should dump the trace buffer when the bug hits. I try to reproduce >>>> myself. >>> With those: >>> >>> # rtcwake -s 15 -m mem >>> >>> [ 67.069522] kernel BUG at arch/x86/kernel/apic/vector.c:154! >>> [ 67.075509] invalid opcode: 0000 [#1] PREEMPT SMP >>> [ 67.080481] Dumping ftrace buffer: >> Hrm. I completely forgot that this does not dump the buffers of offline >> CPUs. So half of the information is missing. So forget the tracer for now. >> >> Can you please apply the debug patch below and provide the full dmesg >> output? >> >> Its going to be too big for LKML so either upload it somewhere or send it >> to me in private mail. >> >> Note, I removed the BUG_ON, so box might survive suspend/resume but it >> should trigger that printout. > Forgot to add the counterpart to the clear side. Updated patch below. http://paste.debian.net/991048/ -- Petri Latvala
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