Better accommodate random writes larger than blockalign

fill_io_u() fails prematurely if the randomly-chosen offset satisfies blockalign but not min_bs, i.e., the offset lies too near the end of the target region. This change honors both parameters. Signed-off-by: Justin Eno <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
jimharris · Jan 28, 2015 · 0412d12 · 0412d12
1 parent 209e103
commit 0412d12
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/io_u.c b/io_u.c
@@ -68,6 +68,9 @@ static uint64_t last_block(struct thread_data *td, struct fio_file *f,
 	if (td->o.zone_range)
 		max_size = td->o.zone_range;
 
+	if (td->o.min_bs[ddir] > td->o.ba[ddir])
+		max_size -= td->o.min_bs[ddir] - td->o.ba[ddir];
+
 	max_blocks = max_size / (uint64_t) td->o.ba[ddir];
 	if (!max_blocks)
 		return 0;