| Message ID | 1448389419-5296-2-git-send-email-kda@linux-powerpc.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
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. What am I missing? Or does it only hit when you use drmgr? cheers
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 > >
On Thu, 2015-11-26 at 11:15 +0300, Denis Kirjanov wrote: > On 11/26/15, Michael Ellerman <mpe@ellerman.id.au> wrote: > > On Tue, 2015-11-24 at 21:23 +0300, Denis Kirjanov wrote: > > 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. Either manually: $ echo 0 > /sys/devices/system/cpuN/online Or using: $ ppc64_cpu --cores-on=1 and/or $ ppc64_cpu --smt=1 Which uses sysfs. cheers
On 11/26/15, Michael Ellerman <mpe@ellerman.id.au> wrote: > On Thu, 2015-11-26 at 11:15 +0300, Denis Kirjanov wrote: >> On 11/26/15, Michael Ellerman <mpe@ellerman.id.au> wrote: >> > On Tue, 2015-11-24 at 21:23 +0300, Denis Kirjanov wrote: >> > 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. > > Either manually: > > $ echo 0 > /sys/devices/system/cpuN/online > > Or using: > > $ ppc64_cpu --cores-on=1 > and/or > $ ppc64_cpu --smt=1 Ok, I hit the WARNING: (the tree is dirty since I'm investigating the networking csum failure with ipv6) config attached. [ 88.249496] =============================== [ 88.249499] [ INFO: suspicious RCU usage. ] [ 88.249502] 4.4.0-rc2-00011-gb4f8144-dirty #20 Tainted: G S [ 88.249503] ------------------------------- [ 88.249505] ./arch/powerpc/include/asm/trace.h:77 suspicious rcu_dereference_check() usage! [ 88.249506] other info that might help us debug this: [ 88.249508] RCU used illegally from offline CPU! rcu_scheduler_active = 1, debug_locks = 1 [ 88.249510] no locks held by swapper/15/0. [ 88.249511] stack backtrace: [ 88.249514] CPU: 15 PID: 0 Comm: swapper/15 Tainted: G S 4.4.0-rc2-00011-gb4f8144-dirty #20 [ 88.249516] Call Trace: [ 88.249525] [c0000005b76e38f0] [c00000000089cb00] .dump_stack+0x98/0xd4 (unreliable) [ 88.249529] [c0000005b76e3970] [c00000000010a458] .lockdep_rcu_suspicious+0x108/0x170 [ 88.249533] [c0000005b76e3a00] [c000000000069cd0] .__trace_hcall_entry+0x260/0x2b0 [ 88.249536] [c0000005b76e3ab0] [c00000000006a0ac] plpar_hcall_norets_trace+0x34/0x8c [ 88.249539] [c0000005b76e3b20] [c000000000067704] .icp_hv_set_cpu_priority+0x54/0xc0 [ 88.249542] [c0000005b76e3ba0] [c00000000006694c] .xics_teardown_cpu+0x5c/0xa0 [ 88.249545] [c0000005b76e3c20] [c0000000000745fc] .pseries_mach_cpu_die+0x6c/0x320 [ 88.249549] [c0000005b76e3cd0] [c0000000000438dc] .cpu_die+0x3c/0x60 [ 88.249552] [c0000005b76e3d40] [c000000000018398] .arch_cpu_idle_dead+0x28/0x40 [ 88.249555] [c0000005b76e3db0] [c0000000000ffa1c] .cpu_startup_entry+0x4fc/0x560 [ 88.249558] [c0000005b76e3ed0] [c000000000043638] .start_secondary+0x328/0x360 [ 88.249562] [c0000005b76e3f90] [c000000000008a6c] start_secondary_prolog+0x10/0x14 [ 88.249564] =============================== [ 88.249564] [ INFO: suspicious RCU usage. ] [ 88.249566] 4.4.0-rc2-00011-gb4f8144-dirty #20 Tainted: G S [ 88.249566] ------------------------------- [ 88.249568] ./arch/powerpc/include/asm/trace.h:77 suspicious rcu_dereference_check() usage! [ 88.249569] other info that might help us debug this: [ 88.249570] RCU used illegally from offline CPU! rcu_scheduler_active = 1, debug_locks = 1 [ 88.249571] no locks held by swapper/15/0. [ 88.249572] stack backtrace: [ 88.249574] CPU: 15 PID: 0 Comm: swapper/15 Tainted: G S 4.4.0-rc2-00011-gb4f8144-dirty #20 [ 88.249574] Call Trace: [ 88.249578] [c0000005b76e38f0] [c00000000089cb00] .dump_stack+0x98/0xd4 (unreliable) [ 88.249581] [c0000005b76e3970] [c00000000010a458] .lockdep_rcu_suspicious+0x108/0x170 [ 88.249584] [c0000005b76e3a00] [c000000000069d10] .__trace_hcall_entry+0x2a0/0x2b0 [ 88.249587] [c0000005b76e3ab0] [c00000000006a0ac] plpar_hcall_norets_trace+0x34/0x8c [ 88.249590] [c0000005b76e3b20] [c000000000067704] .icp_hv_set_cpu_priority+0x54/0xc0 [ 88.249593] [c0000005b76e3ba0] [c00000000006694c] .xics_teardown_cpu+0x5c/0xa0 [ 88.249596] [c0000005b76e3c20] [c0000000000745fc] .pseries_mach_cpu_die+0x6c/0x320 [ 88.249599] [c0000005b76e3cd0] [c0000000000438dc] .cpu_die+0x3c/0x60 [ 88.249602] [c0000005b76e3d40] [c000000000018398] .arch_cpu_idle_dead+0x28/0x40 [ 88.249605] [c0000005b76e3db0] [c0000000000ffa1c] .cpu_startup_entry+0x4fc/0x560 [ 88.249608] [c0000005b76e3ed0] [c000000000043638] .start_secondary+0x328/0x360 [ 88.249611] [c0000005b76e3f90] [c000000000008a6c] start_secondary_prolog+0x10/0x14 [ 88.249613] =============================== [ 88.249613] [ INFO: suspicious RCU usage. ] [ 88.249615] 4.4.0-rc2-00011-gb4f8144-dirty #20 Tainted: G S [ 88.249615] ------------------------------- [ 88.249617] ./arch/powerpc/include/asm/trace.h:99 suspicious rcu_dereference_check() usage! [ 88.249617] other info that might help us debug this: [ 88.249619] RCU used illegally from offline CPU! rcu_scheduler_active = 1, debug_locks = 1 [ 88.249620] no locks held by swapper/15/0. [ 88.249620] stack backtrace: [ 88.249622] CPU: 15 PID: 0 Comm: swapper/15 Tainted: G S 4.4.0-rc2-00011-gb4f8144-dirty #20 [ 88.249623] Call Trace: [ 88.249626] [c0000005b76e38e0] [c00000000089cb00] .dump_stack+0x98/0xd4 (unreliable) [ 88.249629] [c0000005b76e3960] [c00000000010a458] .lockdep_rcu_suspicious+0x108/0x170 [ 88.249632] [c0000005b76e39f0] [c000000000069f90] .__trace_hcall_exit+0x270/0x2c0 [ 88.249635] [c0000005b76e3ab0] [c00000000006a0e8] plpar_hcall_norets_trace+0x70/0x8c [ 88.249638] [c0000005b76e3b20] [c000000000067704] .icp_hv_set_cpu_priority+0x54/0xc0 [ 88.249641] [c0000005b76e3ba0] [c00000000006694c] .xics_teardown_cpu+0x5c/0xa0 [ 88.249644] [c0000005b76e3c20] [c0000000000745fc] .pseries_mach_cpu_die+0x6c/0x320 [ 88.249647] [c0000005b76e3cd0] [c0000000000438dc] .cpu_die+0x3c/0x60 [ 88.249650] [c0000005b76e3d40] [c000000000018398] .arch_cpu_idle_dead+0x28/0x40 [ 88.249653] [c0000005b76e3db0] [c0000000000ffa1c] .cpu_startup_entry+0x4fc/0x560 [ 88.249656] [c0000005b76e3ed0] [c000000000043638] .start_secondary+0x328/0x360 [ 88.249659] [c0000005b76e3f90] [c000000000008a6c] start_secondary_prolog+0x10/0x14 [ 88.249660] =============================== [ 88.249661] [ INFO: suspicious RCU usage. ] [ 88.249662] 4.4.0-rc2-00011-gb4f8144-dirty #20 Tainted: G S [ 88.249663] ------------------------------- [ 88.249664] ./arch/powerpc/include/asm/trace.h:99 suspicious rcu_dereference_check() usage! [ 88.249665] other info that might help us debug this: [ 88.249666] RCU used illegally from offline CPU! rcu_scheduler_active = 1, debug_locks = 1 [ 88.249667] no locks held by swapper/15/0. [ 88.249668] stack backtrace: [ 88.249670] CPU: 15 PID: 0 Comm: swapper/15 Tainted: G S 4.4.0-rc2-00011-gb4f8144-dirty #20 [ 88.249670] Call Trace: [ 88.249673] [c0000005b76e38e0] [c00000000089cb00] .dump_stack+0x98/0xd4 (unreliable) [ 88.249677] [c0000005b76e3960] [c00000000010a458] .lockdep_rcu_suspicious+0x108/0x170 [ 88.249680] [c0000005b76e39f0] [c000000000069fd0] .__trace_hcall_exit+0x2b0/0x2c0 [ 88.249682] [c0000005b76e3ab0] [c00000000006a0e8] plpar_hcall_norets_trace+0x70/0x8c [ 88.249686] [c0000005b76e3b20] [c000000000067704] .icp_hv_set_cpu_priority+0x54/0xc0 [ 88.249689] [c0000005b76e3ba0] [c00000000006694c] .xics_teardown_cpu+0x5c/0xa0 [ 88.249691] [c0000005b76e3c20] [c0000000000745fc] .pseries_mach_cpu_die+0x6c/0x320 [ 88.249694] [c0000005b76e3cd0] [c0000000000438dc] .cpu_die+0x3c/0x60 [ 88.249697] [c0000005b76e3d40] [c000000000018398] .arch_cpu_idle_dead+0x28/0x40 [ 88.249700] [c0000005b76e3db0] [c0000000000ffa1c] .cpu_startup_entry+0x4fc/0x560 [ 88.249703] [c0000005b76e3ed0] [c000000000043638] .start_secondary+0x328/0x360 [ 88.249706] [c0000005b76e3f90] [c000000000008a6c] start_secondary_prolog+0x10/0x14 ps700_1 src # > > Which uses sysfs. > > cheers > >
I can take this series through my tree, but I need a acked-by from a PPC maintainer for this patch. -- Steve On Tue, 24 Nov 2015 21:23:39 +0300 Denis Kirjanov <kda@linux-powerpc.org> 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 using > TRACE_EVENT_FN_COND > > Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> > --- > arch/powerpc/include/asm/trace.h | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/arch/powerpc/include/asm/trace.h b/arch/powerpc/include/asm/trace.h > index 8e86b48..3dc5803 100644 > --- a/arch/powerpc/include/asm/trace.h > +++ b/arch/powerpc/include/asm/trace.h > @@ -57,12 +57,14 @@ DEFINE_EVENT(ppc64_interrupt_class, timer_interrupt_exit, > extern void hcall_tracepoint_regfunc(void); > extern void hcall_tracepoint_unregfunc(void); > > -TRACE_EVENT_FN(hcall_entry, > +TRACE_EVENT_FN_COND(hcall_entry, > > TP_PROTO(unsigned long opcode, unsigned long *args), > > TP_ARGS(opcode, args), > > + TP_CONDITION(cpu_online(smp_processor_id())), > + > TP_STRUCT__entry( > __field(unsigned long, opcode) > ), > @@ -76,13 +78,15 @@ TRACE_EVENT_FN(hcall_entry, > hcall_tracepoint_regfunc, hcall_tracepoint_unregfunc > ); > > -TRACE_EVENT_FN(hcall_exit, > +TRACE_EVENT_FN_COND(hcall_exit, > > TP_PROTO(unsigned long opcode, unsigned long retval, > unsigned long *retbuf), > > TP_ARGS(opcode, retval, retbuf), > > + TP_CONDITION(cpu_online(smp_processor_id())), > + > TP_STRUCT__entry( > __field(unsigned long, opcode) > __field(unsigned long, retval)
On Mon, 2015-12-07 at 15:52 -0500, Steven Rostedt wrote: > > + TP_CONDITION(cpu_online(smp_processor_id())), > > + This should probably be some kind of __raw version though, hcalls can be called in contexts where the debug stuff in smp_processor_id() isn't safe (or preempt enabled). Cheers, Ben.
On Tue, 08 Dec 2015 08:02:15 +1100 Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote: > On Mon, 2015-12-07 at 15:52 -0500, Steven Rostedt wrote: > > > + TP_CONDITION(cpu_online(smp_processor_id())), > > > + > > This should probably be some kind of __raw version though, hcalls can > be called in contexts where the debug stuff in smp_processor_id() isn't > safe (or preempt enabled). > OK, then that needs to be updated. -- Steve
On Mon, 2015-12-07 at 16:33 -0500, Steven Rostedt wrote: > On Tue, 08 Dec 2015 08:02:15 +1100 > Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote: > > On Mon, 2015-12-07 at 15:52 -0500, Steven Rostedt wrote: > > > > + TP_CONDITION(cpu_online(smp_processor_id())), > > > > + > > > > This should probably be some kind of __raw version though, hcalls can > > be called in contexts where the debug stuff in smp_processor_id() isn't > > safe (or preempt enabled). > > > > OK, then that needs to be updated. Denis, please respin with raw_smp_processor_id(). cheers
On 12/14/15, Michael Ellerman <mpe@ellerman.id.au> wrote: > On Mon, 2015-12-07 at 16:33 -0500, Steven Rostedt wrote: >> On Tue, 08 Dec 2015 08:02:15 +1100 >> Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote: >> > On Mon, 2015-12-07 at 15:52 -0500, Steven Rostedt wrote: >> > > > + TP_CONDITION(cpu_online(smp_processor_id())), >> > > > + >> > >> > This should probably be some kind of __raw version though, hcalls can >> > be called in contexts where the debug stuff in smp_processor_id() isn't >> > safe (or preempt enabled). >> > >> >> OK, then that needs to be updated. > > Denis, please respin with raw_smp_processor_id(). Sure, I'll respin today. Thanks! > > cheers > >
diff --git a/arch/powerpc/include/asm/trace.h b/arch/powerpc/include/asm/trace.h index 8e86b48..3dc5803 100644 --- a/arch/powerpc/include/asm/trace.h +++ b/arch/powerpc/include/asm/trace.h @@ -57,12 +57,14 @@ DEFINE_EVENT(ppc64_interrupt_class, timer_interrupt_exit, extern void hcall_tracepoint_regfunc(void); extern void hcall_tracepoint_unregfunc(void); -TRACE_EVENT_FN(hcall_entry, +TRACE_EVENT_FN_COND(hcall_entry, TP_PROTO(unsigned long opcode, unsigned long *args), TP_ARGS(opcode, args), + TP_CONDITION(cpu_online(smp_processor_id())), + TP_STRUCT__entry( __field(unsigned long, opcode) ), @@ -76,13 +78,15 @@ TRACE_EVENT_FN(hcall_entry, hcall_tracepoint_regfunc, hcall_tracepoint_unregfunc ); -TRACE_EVENT_FN(hcall_exit, +TRACE_EVENT_FN_COND(hcall_exit, TP_PROTO(unsigned long opcode, unsigned long retval, unsigned long *retbuf), TP_ARGS(opcode, retval, retbuf), + TP_CONDITION(cpu_online(smp_processor_id())), + TP_STRUCT__entry( __field(unsigned long, opcode) __field(unsigned long, retval)
./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 using TRACE_EVENT_FN_COND Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> --- arch/powerpc/include/asm/trace.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)