From 5a73db26d5ebd8137b1446f6bb14e2b4e4f48ea9 Mon Sep 17 00:00:00 2001 From: Justin Eno Date: Tue, 27 Jan 2015 11:12:50 -0800 Subject: [PATCH] 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 --- io_u.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/io_u.c b/io_u.c index 5971d78..b1aa8a8 100644 --- a/io_u.c +++ b/io_u.c @@ -55,6 +55,7 @@ static uint64_t last_block(struct thread_data *td, struct fio_file *f, { uint64_t max_blocks; uint64_t max_size; + uint64_t min_size; assert(ddir_rw(ddir)); @@ -69,6 +70,12 @@ static uint64_t last_block(struct thread_data *td, struct fio_file *f, max_size = td->o.zone_range; max_blocks = max_size / (uint64_t) td->o.ba[ddir]; + min_size = td->o.ba[ddir]; + while (min_size < td->o.min_bs[ddir]) { + min_size += td->o.ba[ddir]; + } + + max_blocks = max_size / min_size; if (!max_blocks) return 0; -- 1.7.1