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authorJan Beulich <JBeulich@suse.com>2012-03-23 18:01:52 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-23 19:58:31 -0400
commit7ccaba5314caf3a2b1052edb3146ccc969b4d466 (patch)
treeb2d2c6a0c188794bf334b163bd89d827c84c1462 /include/linux/rcupdate.h
parent10db4e1e4e9a910a26b94045660e5ba7e7c71419 (diff)
consolidate WARN_...ONCE() static variables
Due to the alignment of following variables, these typically consume more than just the single byte that 'bool' requires, and as there are a few hundred instances, the cache pollution (not so much the waste of memory) sums up. Put these variables into their own section, outside of any half way frequently used memory range. Do the same also to the __warned variable of rcu_lockdep_assert(). (Don't, however, include the ones used by printk_once() and alike, as they can potentially be hot.) Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/rcupdate.h')
-rw-r--r--include/linux/rcupdate.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 937217425c47..2c62594b67dd 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -418,7 +418,7 @@ extern int rcu_my_thread_group_empty(void);
418 */ 418 */
419#define rcu_lockdep_assert(c, s) \ 419#define rcu_lockdep_assert(c, s) \
420 do { \ 420 do { \
421 static bool __warned; \ 421 static bool __section(.data.unlikely) __warned; \
422 if (debug_lockdep_rcu_enabled() && !__warned && !(c)) { \ 422 if (debug_lockdep_rcu_enabled() && !__warned && !(c)) { \
423 __warned = true; \ 423 __warned = true; \
424 lockdep_rcu_suspicious(__FILE__, __LINE__, s); \ 424 lockdep_rcu_suspicious(__FILE__, __LINE__, s); \