From: Vincent Fu <Vincent.Fu@sandisk.com>
Date: Thu, 23 Jun 2016 15:32:04 +0000 (-0400)
Subject: Add locking around reads of td->io_blocks and io_byes.
X-Git-Tag: fio-2.16~3^2~36
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=0587ef3261e642a444616b2d24c192f943f44d8f

Add locking around reads of td->io_blocks and io_byes.

This is present in add_bw/iops/lat_sample but absent from show_thread_status. Not certain if this is really necessary.
---

diff --git a/steadystate.c b/steadystate.c
index 1e7212f8..e0dcc22e 100644
--- a/steadystate.c
+++ b/steadystate.c
@@ -69,10 +69,12 @@ void steadystate_check()
 			if (utime_since(&td->epoch, &now) >= (ss->ramp_time + 1000000L))
 				ss->ramp_time_over = 1;
 
+		td_io_u_lock(td);
 		for (ddir = DDIR_READ; ddir < DDIR_RWDIR_CNT; ddir++) {
 			td_iops += td->io_blocks[ddir];
 			td_bytes += td->io_bytes[ddir];
 		}
+		td_io_u_unlock(td);
 
 		rate_time = mtime_since(&ss->prev_time, &now);
 		memcpy(&ss->prev_time, &now, sizeof(now));