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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-01-13 15:32:18 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-02-21 09:03:48 -0800 |
| commit | 13cfcca0e4e2d4cee1d0183c049eb34e54ac976e (patch) | |
| tree | 2aa48f0db717ae7741602022e4020f22cc3cea7f /kernel/rcutree.h | |
| parent | 27565d64a4e564e72c22d8c91a3cfcb9442383e8 (diff) | |
| download | linux-13cfcca0e4e2d4cee1d0183c049eb34e54ac976e.tar.gz linux-13cfcca0e4e2d4cee1d0183c049eb34e54ac976e.tar.bz2 linux-13cfcca0e4e2d4cee1d0183c049eb34e54ac976e.zip | |
rcu: Set RCU CPU stall times via sysfs
The default CONFIG_RCU_CPU_STALL_TIMEOUT value of 60 seconds has served
Linux users well for production use for quite some time. However, for
debugging, there will be more than three minutes between subsequent
stall-warning messages. This can be an annoyingly long wait if you
are trying to work out where the offending infinite loop is hiding.
Therefore, this commit provides a rcu_cpu_stall_timeout sysfs
parameter that may be adjusted at boot time and at runtime to speed
up debugging.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutree.h')
| -rw-r--r-- | kernel/rcutree.h | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h index 58c9fc3bc820..0328a537846a 100644 --- a/kernel/rcutree.h +++ b/kernel/rcutree.h @@ -314,12 +314,6 @@ struct rcu_data { #else #define RCU_STALL_DELAY_DELTA 0 #endif - -#define RCU_SECONDS_TILL_STALL_CHECK (CONFIG_RCU_CPU_STALL_TIMEOUT * HZ + \ - RCU_STALL_DELAY_DELTA) - /* for rsp->jiffies_stall */ -#define RCU_SECONDS_TILL_STALL_RECHECK (3 * RCU_SECONDS_TILL_STALL_CHECK + 30) - /* for rsp->jiffies_stall */ #define RCU_STALL_RAT_DELAY 2 /* Allow other CPUs time */ /* to take at least one */ /* scheduling clock irq */ |