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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2012-10-19 12:49:17 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2013-01-28 22:06:21 -0800 |
| commit | 6bfc09e2327dfbffc312004c16188dbf8dfb0297 (patch) | |
| tree | f36ac34ec671ea5eaa926ebabba8486bbda9c175 /kernel/rcutree.h | |
| parent | 1b0048a44c502c5ab850203e6e0a6498d7d8676d (diff) | |
| download | linux-6bfc09e2327dfbffc312004c16188dbf8dfb0297.tar.gz linux-6bfc09e2327dfbffc312004c16188dbf8dfb0297.tar.bz2 linux-6bfc09e2327dfbffc312004c16188dbf8dfb0297.zip | |
rcu: Provide RCU CPU stall warnings for tiny RCU
Tiny RCU has historically omitted RCU CPU stall warnings in order to
reduce memory requirements, however, lack of these warnings caused
Thomas Gleixner some debugging pain recently. Therefore, this commit
adds RCU CPU stall warnings to tiny RCU if RCU_TRACE=y. This keeps
the memory footprint small, while still enabling CPU stall warnings
in kernels built to enable them.
Updated to include Josh Triplett's suggested use of RCU_STALL_COMMON
config variable to simplify #if expressions.
Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
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.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h index 4b69291b093d..db9bec83fe3f 100644 --- a/kernel/rcutree.h +++ b/kernel/rcutree.h @@ -343,11 +343,6 @@ struct rcu_data { #define RCU_JIFFIES_TILL_FORCE_QS 3 /* for rsp->jiffies_force_qs */ -#ifdef CONFIG_PROVE_RCU -#define RCU_STALL_DELAY_DELTA (5 * HZ) -#else -#define RCU_STALL_DELAY_DELTA 0 -#endif #define RCU_STALL_RAT_DELAY 2 /* Allow other CPUs time */ /* to take at least one */ /* scheduling clock irq */ |