Tweak writeback a little to create more inodes and pressure the allocator

Signed-off-by: Chris Mason <clm@fb.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/simoop.c b/simoop.c
index 9536dc8..1bb0c67 100644
--- a/simoop.c
+++ b/simoop.c
@@ -1333,6 +1333,15 @@ static void write_to_file(char *path, int seq, char *buf)
 		}
 	} else {
 		postfix = RESULT_FILE;
+		join_path(name, path, seq, postfix);
+		/* make sure that we're making new inodes for the result
+		 * files
+		 */
+		ret = unlink(name);
+		if (ret < 0 && errno != ENOENT) {
+			perror("unlink");
+			exit(1);
+		}
 		fd = open_path(path, seq, RESULT_FILE, 0);
 		offset = 0;
 	}
@@ -1358,7 +1367,16 @@ static void write_to_file(char *path, int seq, char *buf)
 	 * lets create some churn of inodes coming in and out and abuse
 	 * the orphan code while we're here
 	 */
-	if (rand() % 5 == 0) {
+	if (rand() % 3 == 0) {
+		/*
+		 * make sure the extents actually get allocated and work
+		 * is done
+		 */
+		ret = sync_file_range(fd, 0, 0, SYNC_FILE_RANGE_WRITE);
+		if (ret < 0) {
+			perror("sync_file_range");
+			exit(1);
+		}
 		ret = unlink(name);
 		if (ret < 0 && errno != ENOENT) {
 			perror("unlink");