Fix kevent's childs priority greediness
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
[akpm@linux-foundation.org: add comment]
Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 @@
/* 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,
