From: Jens Axboe <axboe@kernel.dk>
Date: Sun, 30 Sep 2018 14:41:40 +0000 (-0600)
Subject: engines/cpu: fix potential overflow in thinktime calculation
X-Git-Tag: fio-3.11~6
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=2bce52c621f0e1d7a360e8aedfe23300f8e56bb9

engines/cpu: fix potential overflow in thinktime calculation

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/engines/cpu.c b/engines/cpu.c
index 09872508..4d572b44 100644
--- a/engines/cpu.c
+++ b/engines/cpu.c
@@ -85,7 +85,7 @@ static int fio_cpuio_init(struct thread_data *td)
 	 */
 	o->thinktime_blocks = 1;
 	o->thinktime_spin = 0;
-	o->thinktime = (co->cpucycle * (100 - co->cpuload)) / co->cpuload;
+	o->thinktime = ((unsigned long long) co->cpucycle * (100 - co->cpuload)) / co->cpuload;
 
 	o->nr_files = o->open_files = 1;