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Groups > linux.kernel > #1278057
| From | Denis Kirjanov <kda@linux-powerpc.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/2] powerpc: tracing: don't trace hcalls on offline CPUs |
| Date | 2015-11-26 09:20 +0100 |
| Message-ID | <qyZWx-2oi-9@gated-at.bofh.it> (permalink) |
| References | <qyqvL-3iT-5@gated-at.bofh.it> <qyqvM-3iT-23@gated-at.bofh.it> <qyYnL-14m-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 11/26/15, Michael Ellerman <mpe@ellerman.id.au> wrote: > On Tue, 2015-11-24 at 21:23 +0300, Denis Kirjanov wrote: > >> ./drmgr -c cpu -a -r gives the following warning: >> >> [ 2327.035563] RCU used illegally from offline CPU! >> rcu_scheduler_active = 1, debug_locks = 1 >> [ 2327.035564] no locks held by swapper/12/0. >> [ 2327.035565] stack backtrace: >> [ 2327.035567] CPU: 12 PID: 0 Comm: swapper/12 Tainted: G S > >> 4.3.0-rc3-00060-g353169a #5 >> [ 2327.035568] Call Trace: >> [ 2327.035573] [c0000001d62578e0] [c0000000008977fc] .dump_stack+0x98/0xd4 >> (unreliable) >> [ 2327.035577] [c0000001d6257960] [c000000000109bd8] >> .lockdep_rcu_suspicious+0x108/0x170 >> [ 2327.035580] [c0000001d62579f0] [c00000000006a1d0] >> .__trace_hcall_exit+0x2b0/0x2c0 >> [ 2327.035584] [c0000001d6257ab0] [c00000000006a2e8] >> plpar_hcall_norets_trace+0x70/0x8c >> [ 2327.035588] [c0000001d6257b20] [c000000000067a14] >> .icp_hv_set_cpu_priority+0x54/0xc0 >> [ 2327.035592] [c0000001d6257ba0] [c000000000066c5c] >> .xics_teardown_cpu+0x5c/0xa0 >> [ 2327.035595] [c0000001d6257c20] [c0000000000747ac] >> .pseries_mach_cpu_die+0x6c/0x320 >> [ 2327.035598] [c0000001d6257cd0] [c0000000000439cc] .cpu_die+0x3c/0x60 >> [ 2327.035602] [c0000001d6257d40] [c0000000000183d8] >> .arch_cpu_idle_dead+0x28/0x40 >> [ 2327.035606] [c0000001d6257db0] [c0000000000ff1dc] >> .cpu_startup_entry+0x4fc/0x560 >> [ 2327.035610] [c0000001d6257ed0] [c000000000043728] >> .start_secondary+0x328/0x360 >> [ 2327.035614] [c0000001d6257f90] [c000000000008a6c] >> start_secondary_prolog+0x10/0x14 >> [ 2327.035620] cpu 12 (hwid 12) Ready to die... >> [ 2327.144463] cpu 13 (hwid 13) Ready to die... >> [ 2327.294180] cpu 14 (hwid 14) Ready to die... >> [ 2327.403599] cpu 15 (hwid 15) Ready to die... > > > I can't get this to hit. > > I've got LOCKDEP=y, I've enabled the hcall tracepoints, and then I offline > a > cpu via sysfs. I haven't tried it via sysfs. Could you share the command so I give a try to reproduce. > > What am I missing? Or does it only hit when you use drmgr? Right, I hit it with drmgr... > > cheers > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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[PATCH 1/2] tracing: introduce TRACE_EVENT_FN_COND macro Denis Kirjanov <kda@linux-powerpc.org> - 2015-11-24 19:30 +0100
[PATCH 2/2] powerpc: tracing: don't trace hcalls on offline CPUs Denis Kirjanov <kda@linux-powerpc.org> - 2015-11-24 19:30 +0100
Re: [PATCH 2/2] powerpc: tracing: don't trace hcalls on offline CPUs Michael Ellerman <mpe@ellerman.id.au> - 2015-11-26 07:40 +0100
Re: [PATCH 2/2] powerpc: tracing: don't trace hcalls on offline CPUs Denis Kirjanov <kda@linux-powerpc.org> - 2015-11-26 09:20 +0100
Re: [PATCH 2/2] powerpc: tracing: don't trace hcalls on offline CPUs Michael Ellerman <mpe@ellerman.id.au> - 2015-11-26 10:30 +0100
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