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-rw-r--r--fs/bcachefs/io_write.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/bcachefs/io_write.c b/fs/bcachefs/io_write.c
index d7620138e038..44b02d4b6502 100644
--- a/fs/bcachefs/io_write.c
+++ b/fs/bcachefs/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);
}