bcachefs: add time_stats for btree_node_read_done()
Seeing weird latency issues in the btree node read path - add one
bch2_btree_node_read_done().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
diff --git a/fs/bcachefs/bcachefs.h b/fs/bcachefs/bcachefs.h
index c7ed097..dac383e 100644
--- a/fs/bcachefs/bcachefs.h
+++ b/fs/bcachefs/bcachefs.h
@@ -425,6 +425,7 @@ BCH_DEBUG_PARAMS_DEBUG()
x(btree_node_merge) \
x(btree_node_sort) \
x(btree_node_read) \
+ x(btree_node_read_done) \
x(btree_interior_update_foreground) \
x(btree_interior_update_total) \
x(btree_gc) \
diff --git a/fs/bcachefs/btree_io.c b/fs/bcachefs/btree_io.c
index 38d27ca..cf5089c 100644
--- a/fs/bcachefs/btree_io.c
+++ b/fs/bcachefs/btree_io.c
@@ -942,6 +942,7 @@ int bch2_btree_node_read_done(struct bch_fs *c, struct bch_dev *ca,
unsigned ptr_written = btree_ptr_sectors_written(&b->key);
struct printbuf buf = PRINTBUF;
int ret = 0, retry_read = 0, write = READ;
+ u64 start_time = local_clock();
b->version_ondisk = U16_MAX;
/* We might get called multiple times on read retry: */
@@ -1209,6 +1210,7 @@ int bch2_btree_node_read_done(struct bch_fs *c, struct bch_dev *ca,
out:
mempool_free(iter, &c->fill_iter);
printbuf_exit(&buf);
+ bch2_time_stats_update(&c->times[BCH_TIME_btree_node_read_done], start_time);
return retry_read;
fsck_err:
if (ret == -BCH_ERR_btree_node_read_err_want_retry ||
