diff options
Diffstat (limited to 'libbcachefs/io_write.c')
| -rw-r--r-- | libbcachefs/io_write.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/libbcachefs/io_write.c b/libbcachefs/io_write.c index 9401d13e..db9cda7b 100644 --- a/libbcachefs/io_write.c +++ b/libbcachefs/io_write.c @@ -69,11 +69,10 @@ void bch2_latency_acct(struct bch_dev *ca, u64 submit_time, int rw) u64 io_latency = time_after64(now, submit_time) ? now - submit_time : 0; - u64 old, new, v = atomic64_read(latency); + u64 old, new; + old = atomic64_read(latency); do { - old = v; - /* * If the io latency was reasonably close to the current * latency, skip doing the update and atomic operation - most of @@ -84,7 +83,7 @@ void bch2_latency_acct(struct bch_dev *ca, u64 submit_time, int rw) break; new = ewma_add(old, io_latency, 5); - } while ((v = atomic64_cmpxchg(latency, old, new)) != old); + } while (!atomic64_try_cmpxchg(latency, &old, new)); bch2_congested_acct(ca, io_latency, now, rw); |