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 <jeno@micron.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/io_u.c b/io_u.c
index 5971d78..77a3abf 100644
--- a/io_u.c
+++ b/io_u.c
@@ -68,6 +68,9 @@
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;