From 6a6ca57de92fcae34603551ac944aa74758c30d4 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 3 Jun 2010 12:44:30 +0200 Subject: 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 --- fs/pipe.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/fs/pipe.c b/fs/pipe.c index 541d662..369a024 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -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; } -- cgit v1.1