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authorJan Engelhardt <jengelh@linux01.gwdg.de>2007-05-08 00:28:24 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:07 -0700
commitb73a7e76c1eeaa770a41554698917c3c45686a07 (patch)
tree70c9016ca24bc06d1781ace007ce557bbe3d3cf8 /kernel/kmod.c
parent6672f76a5a1878d42264c1deba8f1ab52b4618d9 (diff)
downloadlwn-b73a7e76c1eeaa770a41554698917c3c45686a07.tar.gz
lwn-b73a7e76c1eeaa770a41554698917c3c45686a07.zip
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>
Diffstat (limited to 'kernel/kmod.c')
-rw-r--r--kernel/kmod.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 11c584cd16b3..49cc4b9c1a8d 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,