Fix kevent's childs priority greediness

b73a7e76 · Jan Engelhardt <[email protected]> · 2007-05-08 00:28:24 -07:00

Fix kevent's childs priority greediness.  Such tasks were always scheduled
at nice level -5 and, at that time, udev stole us the CPU time with -5.

Already posted at http://lkml.org/lkml/2005/1/10/85

[[email protected]: add comment]
Signed-off-by: Jan Engelhardt <[email protected]>
Cc: Chris Wright <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit: b73a7e76c1eeaa770a41554698917c3c45686a07
Parents: 6672f76a

Changes

1 files changed · +6 −0

File	Status	Add	Del	Content
kernel/kmod.c	modified	+6	−0	View file

kernel/kmod.c

View file

diff --git a/kernel/kmod.c b/kernel/kmod.c
index 11c584c..49cc4b9 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -165,6 +165,12 @@ static int ____call_usermodehelper(void *data)
 	/* We can run anywhere, unlike our parent keventd(). */
 	set_cpus_allowed(current, CPU_MASK_ALL);
 
+	/*
+	 * Our parent is keventd, which runs with elevated scheduling priority.
+	 * Avoid propagating that into the userspace child.
+	 */
+	set_user_nice(current, 0);
+
 	retval = -EPERM;
 	if (current->fs->root)
 		retval = kernel_execve(sub_info->path,