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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-06-03 01:21:38 +0200
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-08-20 02:18:02 +0200
commitb163760e37047781b37c412cde54d146ac4b651f (patch)
tree5b447a210c81b78e20393472f4b53623c8fed28b /kernel/rcutree.h
parentAdd RCU check for find_task_by_vpid(). (diff)
downloadlinux-b163760e37047781b37c412cde54d146ac4b651f.tar.xz
linux-b163760e37047781b37c412cde54d146ac4b651f.zip
rcu: make CPU stall warning timeout configurable
Also set the default to 60 seconds, up from the previous hard-coded timeout of 10 seconds. This allows people who care to set short timeouts, while avoiding people with unusual configurations (make randconfig!!!) from being bothered with spurious CPU stall warnings. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree.h')
-rw-r--r--kernel/rcutree.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index 5ce197e87792..183ebf405315 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -254,9 +254,10 @@ struct rcu_data {
#define RCU_STALL_DELAY_DELTA 0
#endif
-#define RCU_SECONDS_TILL_STALL_CHECK (10 * HZ + RCU_STALL_DELAY_DELTA)
+#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 (30 * HZ + RCU_STALL_DELAY_DELTA)
+#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 */