On Mon, 8 Sep 2014, Peter Zijlstra wrote:
> On Mon, Sep 08, 2014 at 01:47:11PM -0400, Vince Weaver wrote:
> > Hello
> >
> > so I finally had time to run my perf_fuzzer again and it has rapidly
> > turned up an alarming crash that instant-reboots my core2 test machine.
>
> Urgh, of course :/
So possibly was a waste of time, as it bisects to:
commit 5e467e27b7c7a11ef47068138248003e873674a1
Author: Tony Luck <tony.l...@intel.com>
Date: Wed Jul 30 14:05:15 2014 -0700
[IA64] Wire up getrandom() system call
Which makes no sense at all :(
The times the testcase fails give some pretty spectacular error messages:
[ 78.018145] NOHZ: local_softirq_pending 100
[ 83.012661] BUG: Bad page map in process perf_fuzzer pte:ffff8800cafc5190
pmd:119d00067
[ 83.020863] addr:000000000120c000 vm_flags:00100073
anon_vma:ffff8800cae19dc0 mapping: (null) index:120c
[ 316.040001] general protection fault: 0000 [#1]
[ 178.024220] perf_fuzzer[2788]: segfault at ffff88011fa7bef8 ip
00007f8c0e088c2f sp 00007fff003315e0 error 5
[ 2616.535995] Kernel panic - not syncing: Lost physical address for unconsumed
uncorrectable error
[ 751.656861] NOHZ: local_softirq_pending 100
[ 756.009271] traps: perf_fuzzer[4236] trap invalid opcode ip:4044c0
sp:7fffb0ed6f90 error:0
[ 756.017590] BUG: unable to handle kernel paging request
among others.
Vince
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