rcu: Dump local stack if cannot dump all CPUs' stacks

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The trigger_all_cpu_backtrace() function is a no-op in architectures that
do not define arch_trigger_all_cpu_backtrace.  On such architectures, RCU
CPU stall warning messages contain no stack trace information, which makes
debugging quite difficult.  This commit therefore substitutes dump_stack()
for architectures that do not define arch_trigger_all_cpu_backtrace,
so that at least the local CPU's stack is dumped as part of the RCU CPU
stall warning message.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Paul E. McKenney 2011-08-03 03:34:24 -07:00

parent 6206ab9bab

commit 4627e240df

1 changed files with 4 additions and 2 deletions

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kernel/rcutree.c

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