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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2012-05-09 19:07:05 (GMT) |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-06-07 03:43:28 (GMT) |
| commit | 5955f7eecd77d6b440db278b266cfecdb72ecd00 (patch) | |
| tree | a69a23707da5595be22fa09738be572a4ef69b4c /kernel/rcutree.h | |
| parent | fd4b352687fd8604d49c190c4c9ea9e369fd42d5 (diff) | |
| download | linux-5955f7eecd77d6b440db278b266cfecdb72ecd00.tar.xz | |
rcu: Move RCU_FAST_NO_HZ per-CPU variables to rcu_dynticks structure
The RCU_FAST_NO_HZ code relies on a number of per-CPU variables.
This works, but is hidden from someone scanning the data structures
in rcutree.h. This commit therefore converts these per-CPU variables
to fields in the per-CPU rcu_dynticks structures.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Tested-by: Pascal Chapperon <pascal.chapperon@wanadoo.fr>
Diffstat (limited to 'kernel/rcutree.h')
| -rw-r--r-- | kernel/rcutree.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h index 7f5d138..ea05649 100644 --- a/kernel/rcutree.h +++ b/kernel/rcutree.h @@ -84,6 +84,20 @@ struct rcu_dynticks { /* Process level is worth LLONG_MAX/2. */ int dynticks_nmi_nesting; /* Track NMI nesting level. */ atomic_t dynticks; /* Even value for idle, else odd. */ +#ifdef CONFIG_RCU_FAST_NO_HZ + int dyntick_drain; /* Prepare-for-idle state variable. */ + unsigned long dyntick_holdoff; + /* No retries for the jiffy of failure. */ + struct timer_list idle_gp_timer; + /* Wake up CPU sleeping with callbacks. */ + unsigned long idle_gp_timer_expires; + /* When to wake up CPU (for repost). */ + bool idle_first_pass; /* First pass of attempt to go idle? */ + unsigned long nonlazy_posted; + /* # times non-lazy CBs posted to CPU. */ + unsigned long nonlazy_posted_snap; + /* idle-period nonlazy_posted snapshot. */ +#endif /* #ifdef CONFIG_RCU_FAST_NO_HZ */ }; /* RCU's kthread states for tracing. */ |