On 11/3/15, Denis Kirjanov <k...@linux-powerpc.org> wrote: > On 11/3/15, Michael Ellerman <m...@ellerman.id.au> wrote: >> On Thu, 2015-10-29 at 22:10 +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... >>> >>> Make the hypervisor tracepoints conditional by introducing >>> TRACE_EVENT_FN_COND similar to TRACE_EVENT_FN >> >> We've fixed other cases like this with RCU_NONIDLE(), but I assume that >> doesn't work here because we're actually offline? > > Yes, in this case we're moving the complete core offline through dlpar... >
Hi Michael, Could you pick this patch? Thanks! >> >> cheers >> >> > -- 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/
