From: Curt Wohlgemuth <curtw@google.com>
Date: Tue, 7 Feb 2012 19:16:06 +0000 (-0800)
Subject: fsx: fix msync parameters
X-Git-Tag: v2022.05.01~3612
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=a7e35712e894152c6b277bcb69e3623e0e6d545c;p=xfstests-dev.git

fsx: fix msync parameters

This explicitly sends MS_SYNC as the flag to msync() in
fsx.c, in domapwrite().  Without this flag, the memory
written to the mmap'ed region will not be flushed to disk;
in fact, on Linux, calling msync() with a '0' or MS_ASYNC
flag is a no-op.

Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---

diff --git a/ltp/fsx.c b/ltp/fsx.c
index b36c201e..2f1e3e83 100644
--- a/ltp/fsx.c
+++ b/ltp/fsx.c
@@ -779,7 +779,7 @@ domapwrite(unsigned offset, unsigned size)
 		report_failure(202);
 	}
 	memcpy(p + pg_offset, good_buf + offset, size);
-	if (msync(p, map_size, 0) != 0) {
+	if (msync(p, map_size, MS_SYNC) != 0) {
 		prterr("domapwrite: msync");
 		report_failure(203);
 	}