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bcachefs: Inline fast path of bch2_increment_clock()

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Shaving more cycles.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2019-11-07 15:00:08 -05:00 committed by Kent Overstreet
parent f58c22e76f
commit 6baf2730cc
2 changed files with 15 additions and 5 deletions
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7
fs/bcachefs/clock.c
View file

@ -135,17 +135,16 @@ static struct io_timer *get_expired_timer(struct io_clock *clock,
return ret;
}
void bch2_increment_clock(struct bch_fs *c, unsigned sectors, int rw)
void __bch2_increment_clock(struct io_clock *clock)
{
struct io_clock *clock = &c->io_clock[rw];
struct io_timer *timer;
unsigned long now;
unsigned sectors;
/* Buffer up one megabyte worth of IO in the percpu counter */
preempt_disable();
if (likely(this_cpu_add_return(*clock->pcpu_buf, sectors) <
IO_CLOCK_PCPU_SECTORS)) {
if (this_cpu_read(*clock->pcpu_buf) < IO_CLOCK_PCPU_SECTORS) {
preempt_enable();
return;
}

13
fs/bcachefs/clock.h
View file

@ -6,7 +6,18 @@ void bch2_io_timer_add(struct io_clock *, struct io_timer *);
void bch2_io_timer_del(struct io_clock *, struct io_timer *);
void bch2_kthread_io_clock_wait(struct io_clock *, unsigned long,
unsigned long);
void bch2_increment_clock(struct bch_fs *, unsigned, int);
void __bch2_increment_clock(struct io_clock *);
static inline void bch2_increment_clock(struct bch_fs *c, unsigned sectors,
int rw)
{
struct io_clock *clock = &c->io_clock[rw];
if (unlikely(this_cpu_add_return(*clock->pcpu_buf, sectors) >=
IO_CLOCK_PCPU_SECTORS))
__bch2_increment_clock(clock);
}
void bch2_io_clock_schedule_timeout(struct io_clock *, unsigned long);