Split the locked part so we can do other operations with the counter in other call sites.
Signed-off-by: Glauber Costa <[email protected]> --- include/linux/percpu_counter.h | 1 + lib/percpu_counter.c | 12 ++++++++++-- 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h index b9df9ed..8310548 100644 --- a/include/linux/percpu_counter.h +++ b/include/linux/percpu_counter.h @@ -40,6 +40,7 @@ void percpu_counter_destroy(struct percpu_counter *fbc); void percpu_counter_set(struct percpu_counter *fbc, s64 amount); void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch); s64 __percpu_counter_sum(struct percpu_counter *fbc); +s64 __percpu_counter_sum_locked(struct percpu_counter *fbc); int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs); static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount) diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c index f8a3f1a..0b6a672 100644 --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -93,17 +93,25 @@ EXPORT_SYMBOL(__percpu_counter_add); * Add up all the per-cpu counts, return the result. This is a more accurate * but much slower version of percpu_counter_read_positive() */ -s64 __percpu_counter_sum(struct percpu_counter *fbc) +s64 __percpu_counter_sum_locked(struct percpu_counter *fbc) { s64 ret; int cpu; - raw_spin_lock(&fbc->lock); ret = fbc->count; for_each_online_cpu(cpu) { s32 *pcount = per_cpu_ptr(fbc->counters, cpu); ret += *pcount; } + return ret; +} +EXPORT_SYMBOL(__percpu_counter_sum_locked); + +s64 __percpu_counter_sum(struct percpu_counter *fbc) +{ + s64 ret; + raw_spin_lock(&fbc->lock); + ret = __percpu_counter_sum_locked(fbc); raw_spin_unlock(&fbc->lock); return ret; } -- 1.7.4.1 _______________________________________________ Devel mailing list [email protected] https://openvz.org/mailman/listinfo/devel
