On 12/02/2014 02:27 PM, William Cohen wrote: > Hi Masami and Dave, > > I have applied the suggested patch above to my local kernel. However, I have > noticed systemtap testsuite consistently getting panics when running both > before AND after applying that patch to the kernel. Any thoughts on why > "perf stat" would cause that? Below is an example output > > -Will
This problem doesn't look like it is related to the kprobes support. It can be triggered without running kprobes related code such as a "perf stat make" on a user-space build. It's failure looks similar to: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-June/265814.html -Will > > # perf stat make install > > ... > > Running ./systemtap/notest.exp ... > Running ./systemtap.apps/java.exp ... > [ 6734.986063] Bad mode in FIQ handler detected, code 0x56000000 > [ 6734.991788] CPU: 0 PID: 3968 Comm: stap Tainted: G E > 3.18.0-rc5kp3+ #3 > [ 6734.999317] Hardware name: APM X-Gene Mustang board (DT) > [ 6735.004602] task: fffffe0016c25a00 ti: fffffe03d8aa8000 task.ti: > fffffe03d8aa8000 > [ 6735.012052] PC is at 0x3ff7fc0d1fc > [ 6735.015434] LR is at 0x3ff7fc31838 > [ 6735.018815] pc : [<000003ff7fc0d1fc>] lr : [<000003ff7fc31838>] pstate: > 00000000 > [ 6735.026172] sp : fffffe03d8aabff0 > [ 6735.029467] x29: 000003fffe4f6460 x28: 000003ff7fb23640 > [ 6735.034772] x27: 000003ff7fb23578 x26: 000000000059a420 > [ 6735.040074] x25: 000000000000005f x24: 000003ff7fb3f000 > [ 6735.045375] x23: 000000004178ee40 x22: 0000000000000006 > [ 6735.050680] x21: 0000000000000001 x20: 0000000000008000 > [ 6735.055980] x19: 000000004178ee40 x18: 000003fffe4f64a0 > [ 6735.061282] x17: 000003ff7fc0d1fc x16: 000003ff7fd00008 > [ 6735.066585] x15: 00000013cd9f3df0 x14: 0000000051c4a1f8 > [ 6735.071886] x13: 0000000001519f64 x12: 000000000000000e > [ 6735.077187] x11: 646f6d2f62696c2f x10: 6174732f706d742f > [ 6735.082488] x9 : 312e332f73656c75 x8 : 0000000000000038 > [ 6735.087790] x7 : 5f34366372617073 x6 : 000000000000007c > [ 6735.093094] x5 : 0000000000000000 x4 : 0000000000000001 > [ 6735.098397] x3 : 0000000000000000 x2 : 0000000000000000 > [ 6735.103697] x1 : 0000000000000001 x0 : 0000000000008030 > [ 6735.108999] > [ 6735.110483] Bad mode in Synchronous Abort handler detected, code 0x8600000f > [ 6735.117408] CPU: 0 PID: 3968 Comm: stap Tainted: G E > 3.18.0-rc5kp3+ #3 > [ 6735.124936] Hardware name: APM X-Gene Mustang board (DT) > [ 6735.130220] task: fffffe0016c25a00 ti: fffffe03d8aa8000 task.ti: > fffffe03d8aa8000 > [ 6735.137662] PC is at 0x3ff7fc31838 > [ 6735.141044] LR is at 0x3ff7fc31838 > [ 6735.144426] pc : [<000003ff7fc31838>] lr : [<000003ff7fc31838>] pstate: > 600003c5 > [ 6735.151782] sp : fffffe03d8aabed0 > [ 6735.155077] x29: 000003fffe4f6460 x28: 000003ff7fb23640 > [ 6735.160380] x27: 000003ff7fb23578 x26: 000000000059a420 > [ 6735.165681] x25: 000000000000005f x24: 000003ff7fb3f000 > [ 6735.170983] x23: 0000000000000000 x22: 000003ff7fc0d1fc > [ 6735.176285] x21: fffffe03d8aabff0 x20: 0000000000008000 > [ 6735.181587] x19: 000000004178ee40 x18: 000003fffe4f64a0 > [ 6735.186888] x17: 000003ff7fc0d1fc x16: 000003ff7fd00008 > [ 6735.192189] x15: 00000013cd9f3df0 x14: 30303030203a6574 > [ 6735.197490] x13: fffffe00008eda38 x12: cb88537fdc8cb000 > [ 6735.202792] x11: fffffe03d8aabb70 x10: fffffe03d8aabb70 > [ 6735.208094] x9 : 000000000000015f x8 : 0000000000000000 > [ 6735.213395] x7 : 0000000000000200 x6 : fffffe0000095cd4 > [ 6735.218698] x5 : fffffe0300030001 x4 : 0000000000000000 > [ 6735.224001] x3 : fffffe03d8aabc80 x2 : 000000000000027e > [ 6735.229304] x1 : cb88537fdc8cb000 x0 : cb88537fdc8cb000 <snip> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
