pipe: adjust minimum pipe size to 1 page

We don't need to pages to guarantee the POSIX requirement that upto a page size write must be atomic to an empty pipe. Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

pipe: adjust minimum pipe size to 1 page
We don't need to pages to guarantee the POSIX requirement that upto a page size write must be atomic to an empty pipe. Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Jens Axboe
1 parent b4ca761577
Showing 1 changed file with 1 additions and 7 deletions Side-by-side Diff
fs/pipe.c
@@ -1181,13 +1181,7 @@
 		if (!capable(CAP_SYS_ADMIN) && nr_pages > pipe_max_pages) {
 			ret = -EPERM;
 			goto out;
-		}
-
-		/*
-		 * The pipe needs to be at least 2 pages large to
-		 * guarantee POSIX behaviour.
-		 */
-		if (arg < 2) {
+		} else if (nr_pages < 1) {
 			ret = -EINVAL;
 			goto out;
 		}
...	...	@@ -1181,13 +1181,7 @@
1181	1181	if (!capable(CAP_SYS_ADMIN) && nr_pages > pipe_max_pages) {
1182	1182	ret = -EPERM;
1183	1183	goto out;
1184		- }
1185		-
1186		- /*
1187		- * The pipe needs to be at least 2 pages large to
1188		- * guarantee POSIX behaviour.
1189		- */
1190		- if (arg < 2) {
	1184	+ } else if (nr_pages < 1) {
1191	1185	ret = -EINVAL;
1192	1186	goto out;
1193	1187	}