Messages in this thread | | | Date | Thu, 11 Sep 2014 10:11:37 +0200 | From | Peter Zijlstra <> | Subject | Re: BUG uncore_assign_events |
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On Wed, Sep 10, 2014 at 11:59:08PM +0200, Andi Kleen wrote: > > # addr2line -i -e ivb-ep-build/vmlinux ffffffff81025f18 > > > > arch/x86/include/asm/bitops.h:318 > > arch/x86/kernel/cpu/perf_event_intel_uncore.c:3339 > > i == zero (ok) > c points to some kernel looking address > hwc->idx is 64 > > /* fastpath, try to reuse previous register */ > for (i = 0; i < n; i++) { > hwc = &box->event_list[i]->hw; > c = hwc->constraint; > > /* never assigned */ > if (hwc->idx == -1) > break; > > /* constraint still honored */ > if (!test_bit(hwc->idx, c->idxmsk)) > break; > > My best bet is something goes wrong in uncore_pmu_to_box or > uncore_event_to_pmu in hte caller, so the box is bogus. > > Did the test do CPU hot plug?
Dunno, I don't think it does. Its just the perf_fuzzer thing. A quick grep of the source doesn't show hotplug stuff. [unhandled content-type:application/pgp-signature] | |