Commit 6a6ca57d authored by Jens Axboe's avatar Jens Axboe
Browse files

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: default avatarJens Axboe <jaxboe@fusionio.com>
parent b4ca7615

fs/pipe.c

+1 −7
Original line number Diff line number Diff line
@@ -1181,13 +1181,7 @@ long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg) 
		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;

		}