diff options
author | Andrew Morton <akpm@osdl.org> | 2006-03-08 00:55:31 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-08 17:14:01 -0500 |
commit | e2bab3d92486fb781f4d06f56339264ed1492392 (patch) | |
tree | 0295e1ed29794a8e804c4e28a3ea9e72777e533b /include/linux | |
parent | b884e25784f62a1c740d2e4c1ce19cb89644e986 (diff) |
[PATCH] percpu_counter_sum()
Implement percpu_counter_sum(). This is a more accurate but slower version of
percpu_counter_read_positive().
We need this for Alex's speedup-ext3_statfs patch and for the nr_file
accounting fix. Otherwise these things would be too inaccurate on large CPU
counts.
Cc: Ravikiran G Thirumalai <kiran@scalex86.org>
Cc: Alex Tomas <alex@clusterfs.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/percpu_counter.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h index bd6708e2c027..682525511c9e 100644 --- a/include/linux/percpu_counter.h +++ b/include/linux/percpu_counter.h | |||
@@ -39,6 +39,7 @@ static inline void percpu_counter_destroy(struct percpu_counter *fbc) | |||
39 | } | 39 | } |
40 | 40 | ||
41 | void percpu_counter_mod(struct percpu_counter *fbc, long amount); | 41 | void percpu_counter_mod(struct percpu_counter *fbc, long amount); |
42 | long percpu_counter_sum(struct percpu_counter *fbc); | ||
42 | 43 | ||
43 | static inline long percpu_counter_read(struct percpu_counter *fbc) | 44 | static inline long percpu_counter_read(struct percpu_counter *fbc) |
44 | { | 45 | { |
@@ -92,6 +93,11 @@ static inline long percpu_counter_read_positive(struct percpu_counter *fbc) | |||
92 | return fbc->count; | 93 | return fbc->count; |
93 | } | 94 | } |
94 | 95 | ||
96 | static inline long percpu_counter_sum(struct percpu_counter *fbc) | ||
97 | { | ||
98 | return percpu_counter_read_positive(fbc); | ||
99 | } | ||
100 | |||
95 | #endif /* CONFIG_SMP */ | 101 | #endif /* CONFIG_SMP */ |
96 | 102 | ||
97 | static inline void percpu_counter_inc(struct percpu_counter *fbc) | 103 | static inline void percpu_counter_inc(struct percpu_counter *fbc) |