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[Bug runtime/17270] uprobes_onthefly.exp causing hang on ppc64
- From: "dsmith at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Tue, 19 Aug 2014 15:27:32 +0000
- Subject: [Bug runtime/17270] uprobes_onthefly.exp causing hang on ppc64
- Auto-submitted: auto-generated
- References: <bug-17270-6586 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=17270
--- Comment #1 from David Smith <dsmith at redhat dot com> ---
One of the things the test does is turn on on-the-fly debugging using stap's
'-D DEBUG_STP_ON_THE_FLY' flag. Without this flag on, I get a different
behaviour. The tests fail of course, but the test runs until the system hangs.
Here's the console output:
====
[ 260.667249] stap_dcf37cae5885f9b67f9894a335ed6337_3602: module verification
failed: signature and/or required key missing - tainting kernel
[ 347.786372] stap module notifier triggered in unexpected state 3
[ 356.786209] stap module notifier triggered in unexpected state 3
[ 362.386105] stap module notifier triggered in unexpected state 3
[ 440.444905] INFO: rcu_sched detected stalls on CPUs/tasks: { 0 1 6 7}
(detected by 3, t=6002 jiffies, g=1634, c=1633, q=0)
[ 440.445177] Task dump for CPU 0:
[ 440.445267] swapper/0 R running task 0 0 0 0x00000000
[ 440.445362] Call Trace:
[ 440.445403] [c000000001283820] [c00000000011d6c8] .idle_balance+0x128/0x240
(unreliable)
[ 440.445521] [c0000000012839f0] [c0000000000a4194]
.p970_compute_mmcr+0x8d4/0x9f0
[ 440.445630] Task dump for CPU 1:
[ 440.445679] swapper/1 R running task 0 0 1 0x00000800
[ 440.445775] Call Trace:
[ 440.445811] [c00000022df6b870] [c0000000004511c4]
.cpumask_next_and+0x94/0xa0 (unreliable)
[ 440.445929] [c00000022df6ba40] [c0000000000a4194]
.p970_compute_mmcr+0x8d4/0x9f0
[ 440.446039] Task dump for CPU 6:
[ 440.446085] swapper/6 R running task 0 0 1 0x00000800
[ 440.446180] Call Trace:
[ 440.446215] [c00000022df7f870] [c0000000004511c4]
.cpumask_next_and+0x94/0xa0 (unreliable)
[ 440.446330] [c00000022df7fa40] [c0000000007683cc]
.cmsghdr_from_user_compat_to_kern+0x5c/0x350
[ 440.446452] Task dump for CPU 7:
[ 440.446503] swapper/7 R running task 0 0 1 0x00000800
[ 440.446595] Call Trace:
[ 440.446630] [c00000022c003870] [c0000000008ad548] .__schedule+0x898/0xae0
(unreliable)
[ 440.446745] [c00000022c003a40] [c0000000000a4194]
.p970_compute_mmcr+0x8d4/0x9f0
====
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