rcu: Add stall-warning checks for RCU-tasks

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This commit adds a ten-minute RCU-tasks stall warning.  The actual
time is controlled by the boot/sysfs parameter rcu_task_stall_timeout,
with values less than or equal to zero disabling the stall warnings.
The default value is ten minutes, which means that the tasks that have
not yet responded will get their stacks dumped every ten minutes, until
they pass through a voluntary context switch.

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

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Paul E. McKenney 2014-07-01 18:16:30 -07:00

parent f1a828f5fa

commit 52db30ab23

2 changed files with 30 additions and 4 deletions

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5

Documentation/kernel-parameters.txt

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29

kernel/rcu/update.c

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