Commit b73a7e76 authored by Jan Engelhardt's avatar Jan Engelhardt Committed by Linus Torvalds

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: default avatarJan Engelhardt <jengelh@gmx.de>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6672f76a
......@@ -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,
......
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