diff options
Diffstat (limited to 'libbcachefs/io_write.c')
| -rw-r--r-- | libbcachefs/io_write.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libbcachefs/io_write.c b/libbcachefs/io_write.c index d7620138..44b02d4b 100644 --- a/libbcachefs/io_write.c +++ b/libbcachefs/io_write.c @@ -89,7 +89,12 @@ void bch2_latency_acct(struct bch_dev *ca, u64 submit_time, int rw) new = ewma_add(old, io_latency, 5); } while (!atomic64_try_cmpxchg(latency, &old, new)); - bch2_congested_acct(ca, io_latency, now, rw); + /* + * Only track read latency for congestion accounting: writes are subject + * to heavy queuing delays from page cache writeback: + */ + if (rw == READ) + bch2_congested_acct(ca, io_latency, now, rw); __bch2_time_stats_update(&ca->io_latency[rw].stats, submit_time, now); } |