[PATCH 05/11] xfs_scrub: only call read_verify_force_io once per pool

["Darrick J. Wong" <darrick.wong@xxxxxxxxxx>]

From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

There's no reason we need to call read_verify_force_io every AG; we can
just let the request aggregation code do its thing and push when we're
totally done browsing the fsmap information.

Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 scrub/phase6.c      |   16 +++++-----------
 scrub/read_verify.c |   26 +++++++++++++++++---------
 2 files changed, 22 insertions(+), 20 deletions(-)


diff --git a/scrub/phase6.c b/scrub/phase6.c
index f6274a49..8063d6ce 100644
--- a/scrub/phase6.c
+++ b/scrub/phase6.c
@@ -411,7 +411,7 @@ xfs_check_rmap(
 	 */
 	if (map->fmr_flags & (FMR_OF_PREALLOC | FMR_OF_ATTR_FORK |
 			      FMR_OF_EXTENT_MAP | FMR_OF_SPECIAL_OWNER))
-		goto out;
+		return true;
 
 	/* XXX: Filter out directory data blocks. */
 
@@ -423,16 +423,6 @@ xfs_check_rmap(
 		return false;
 	}
 
-out:
-	/* Is this the last extent?  Fire off the read. */
-	if (map->fmr_flags & FMR_OF_LAST) {
-		ret = read_verify_force_io(rvp);
-		if (ret) {
-			str_liberror(ctx, ret, descr);
-			return false;
-		}
-	}
-
 	return true;
 }
 
@@ -448,6 +438,10 @@ clean_pool(
 	if (!rvp)
 		return 0;
 
+	ret = read_verify_force_io(rvp);
+	if (ret)
+		return ret;
+
 	ret = read_verify_pool_flush(rvp);
 	if (ret)
 		goto out_destroy;
diff --git a/scrub/read_verify.c b/scrub/read_verify.c
index 980b92b8..73d30817 100644
--- a/scrub/read_verify.c
+++ b/scrub/read_verify.c
@@ -282,22 +282,30 @@ read_verify_schedule_io(
 	return 0;
 }
 
+/* Force any per-thread stashed IOs into the verifier. */
+static int
+force_one_io(
+	struct ptvar		*ptv,
+	void			*data,
+	void			*foreach_arg)
+{
+	struct read_verify_pool	*rvp = foreach_arg;
+	struct read_verify	*rv = data;
+
+	if (rv->io_length == 0)
+		return 0;
+
+	return read_verify_queue(rvp, rv);
+}
+
 /* Force any stashed IOs into the verifier. */
 int
 read_verify_force_io(
 	struct read_verify_pool		*rvp)
 {
-	struct read_verify		*rv;
-	int				ret;
-
 	assert(rvp->readbuf);
-	rv = ptvar_get(rvp->rvstate, &ret);
-	if (ret)
-		return ret;
-	if (rv->io_length == 0)
-		return 0;
 
-	return read_verify_queue(rvp, rv);
+	return ptvar_foreach(rvp->rvstate, force_one_io, rvp);
 }
 
 /* How many bytes has this process verified? */