AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

pipe: adjust minimum pipe size to 1 page

Browse Source 
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>
This commit is contained in:
Jens Axboe 2010-06-03 12:44:30 +02:00
parent b4ca761577
commit 6a6ca57de9
1 changed files with 1 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/pipe.c
View File

@ -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;
}