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Date: Sat, 6 Jul 2013 00:21:48 +0200 (CEST) From: Thomas Gleixner <tglx@...utronix.de> To: Seiji Aguchi <seiji.aguchi@....com> cc: "H. Peter Anvin" <hpa@...or.com>, Dave Jones <davej@...hat.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Linux Kernel <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>, Peter Zijlstra <peterz@...radead.org> Subject: RE: Yet more softlockups. On Fri, 5 Jul 2013, Seiji Aguchi wrote: > > -----Original Message----- > > Hmmm... this makes me wonder if the interrupt tracepoint stuff is at > > fault here, as it changes the IDT handling for NMI context. > > This softlockup happens while disabling the interrupt tracepoints, > Because if it is enabled, "smp_trace_apic_timer_interrupt" is displayed > instead of "smp_apic_timer_interrupt" in the call trace below. > > But I can't say anything how this issue is related to the tracepoint stuff, I doubt it is related. I rather suspect that trinity is able to fuzz perf into a DoS facility. Dave, can you trace the perf sys calls and dump that data over serial when the softlockup hits? Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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