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authorJens Axboe <jaxboe@fusionio.com>2010-06-03 12:44:30 +0200
committerJens Axboe <jaxboe@fusionio.com>2010-06-03 12:44:30 +0200
commit6a6ca57de92fcae34603551ac944aa74758c30d4 (patch)
tree759f741019bdab40da2feecb13991aaa6310f05f
parentb4ca761577535b2b4d153689ee97342797dfff05 (diff)
downloadop-kernel-dev-6a6ca57de92fcae34603551ac944aa74758c30d4.zip
op-kernel-dev-6a6ca57de92fcae34603551ac944aa74758c30d4.tar.gz
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>
-rw-r--r--fs/pipe.c8
1 files changed, 1 insertions, 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;
}
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