* arch/x86/include/asm/trace/irq_vectors.h:50 suspicious rcu_dereference_check() usage!
@ 2013-07-03 5:28 Dave Jones
2013-07-03 11:46 ` Steven Rostedt
0 siblings, 1 reply; 2+ messages in thread
From: Dave Jones @ 2013-07-03 5:28 UTC (permalink / raw)
To: Steven Rostedt; +Cc: linux-kernel
[ 3206.433900] ===============================
[ 3206.434449] [ INFO: suspicious RCU usage. ]
[ 3206.434999] 3.10.0+ #40 Not tainted
[ 3206.435468] -------------------------------
[ 3206.436018] /home/davej/src/linux-dj/arch/x86/include/asm/trace/irq_vectors.h:50 suspicious rcu_dereference_check() usage!
[ 3206.437383]
other info that might help us debug this:
[ 3206.438388]
RCU used illegally from idle CPU!
rcu_scheduler_active = 1, debug_locks = 0
[ 3206.439733] RCU used illegally from extended quiescent state!
[ 3206.440474] no locks held by trinity-child1/31470.
[ 3206.441096]
stack backtrace:
[ 3206.441667] CPU: 3 PID: 31470 Comm: trinity-child1 Not tainted 3.10.0+ #40
[ 3206.445412] 0000000000000000 ffff880244e03f60 ffffffff816ec1a2 ffff880244e03f90
[ 3206.447288] ffffffff810b8b07 ffff88022e069890 ffff880207809f58 0000000000000006
[ 3206.449335] 0000003e127b97d8 ffff880244e03fa8 ffffffff8102629e 0000000000000282
[ 3206.451405] Call Trace:
[ 3206.452676] <IRQ> [<ffffffff816ec1a2>] dump_stack+0x19/0x1b
[ 3206.454390] [<ffffffff810b8b07>] lockdep_rcu_suspicious+0xe7/0x120
[ 3206.456086] [<ffffffff8102629e>] smp_trace_reschedule_interrupt+0x17e/0x290
[ 3206.457876] [<ffffffff8170022f>] trace_reschedule_interrupt+0x6f/0x80
[ 3206.459593] <EOI> [<ffffffff8114a847>] ? user_enter+0x87/0xd0
[ 3206.461279] [<ffffffff816fa6c5>] do_page_fault+0x45/0x50
[ 3206.462872] [<ffffffff816f6fe2>] page_fault+0x22/0x30
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: arch/x86/include/asm/trace/irq_vectors.h:50 suspicious rcu_dereference_check() usage!
2013-07-03 5:28 arch/x86/include/asm/trace/irq_vectors.h:50 suspicious rcu_dereference_check() usage! Dave Jones
@ 2013-07-03 11:46 ` Steven Rostedt
0 siblings, 0 replies; 2+ messages in thread
From: Steven Rostedt @ 2013-07-03 11:46 UTC (permalink / raw)
To: Dave Jones
Cc: linux-kernel, Ingo Molnar, Seiji Aguchi, H. Peter Anvin,
Thomas Gleixner
On Wed, 2013-07-03 at 01:28 -0400, Dave Jones wrote:
> [ 3206.433900] ===============================
> [ 3206.434449] [ INFO: suspicious RCU usage. ]
> [ 3206.434999] 3.10.0+ #40 Not tainted
> [ 3206.435468] -------------------------------
> [ 3206.436018] /home/davej/src/linux-dj/arch/x86/include/asm/trace/irq_vectors.h:50 suspicious rcu_dereference_check() usage!
> [ 3206.437383]
> other info that might help us debug this:
>
This has been fixed by Seiji and sent to Ingo:
https://lkml.org/lkml/2013/6/28/459
Ingo or Peter, can you pull in his patch.
Thanks,
-- Steve
> [ 3206.438388]
> RCU used illegally from idle CPU!
> rcu_scheduler_active = 1, debug_locks = 0
> [ 3206.439733] RCU used illegally from extended quiescent state!
> [ 3206.440474] no locks held by trinity-child1/31470.
> [ 3206.441096]
> stack backtrace:
> [ 3206.441667] CPU: 3 PID: 31470 Comm: trinity-child1 Not tainted 3.10.0+ #40
> [ 3206.445412] 0000000000000000 ffff880244e03f60 ffffffff816ec1a2 ffff880244e03f90
> [ 3206.447288] ffffffff810b8b07 ffff88022e069890 ffff880207809f58 0000000000000006
> [ 3206.449335] 0000003e127b97d8 ffff880244e03fa8 ffffffff8102629e 0000000000000282
> [ 3206.451405] Call Trace:
> [ 3206.452676] <IRQ> [<ffffffff816ec1a2>] dump_stack+0x19/0x1b
> [ 3206.454390] [<ffffffff810b8b07>] lockdep_rcu_suspicious+0xe7/0x120
> [ 3206.456086] [<ffffffff8102629e>] smp_trace_reschedule_interrupt+0x17e/0x290
> [ 3206.457876] [<ffffffff8170022f>] trace_reschedule_interrupt+0x6f/0x80
> [ 3206.459593] <EOI> [<ffffffff8114a847>] ? user_enter+0x87/0xd0
> [ 3206.461279] [<ffffffff816fa6c5>] do_page_fault+0x45/0x50
> [ 3206.462872] [<ffffffff816f6fe2>] page_fault+0x22/0x30
^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-07-03 5:28 arch/x86/include/asm/trace/irq_vectors.h:50 suspicious rcu_dereference_check() usage! Dave Jones
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