From: Jens Axboe <axboe@fb.com>
Date: Wed, 5 Feb 2014 20:15:22 +0000 (-0700)
Subject: More precise fix for verify_backlog verification failure
X-Git-Tag: fio-2.1.5~13
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=78a6469cfc9094763320e61c60f9aaef0ece9689

More precise fix for verify_backlog verification failure

Commit c2703bf3 could be a bit more precise - we only need to
add to the byte count if verify_backlog is enabled, since that
is the case where do_io() will run both the IO and verify IO.

Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/backend.c b/backend.c
index 84509575..62fa17c3 100644
--- a/backend.c
+++ b/backend.c
@@ -651,8 +651,14 @@ static uint64_t do_io(struct thread_data *td)
 
 	lat_target_init(td);
 
+	/*
+	 * If verify_backlog is enabled, we'll run the verify in this
+	 * handler as well. For that case, we may need up to twice the
+	 * amount of bytes.
+	 */
 	total_bytes = td->o.size;
-	if (td->o.verify != VERIFY_NONE && td_write(td))
+	if (td->o.verify != VERIFY_NONE &&
+	   (td_write(td) && td->o.verify_backlog))
 		total_bytes += td->o.size;
 
 	while ((td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||