linux

iv/linux

History

Oleg Nesterov 0b7570e77f do_wait() wakeup optimization: change __wake_up_parent() to use filtered wakeup

Ratan Nalumasu reported that in a process with many threads doing
unnecessary wakeups.  Every waiting thread in the process wakes up to loop
through the children and see that the only ones it cares about are still
not ready.

Now that we have struct wait_opts we can change do_wait/__wake_up_parent
to use filtered wakeups.

We can make child_wait_callback() more clever later, right now it only
checks eligible_child().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ratan Nalumasu <rnalumasu@gmail.com>
Cc: Vitaly Mayatskikh <vmayatsk@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Tested-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-09-24 07:20:59 -07:00

include

selinux: Support for the new TUN LSM hooks

2009-09-01 08:29:52 +10:00

Merge branch 'master' into next

2009-06-19 08:20:55 +10:00

avc.c

SELinux: do not destroy the avc_cache_nodep

2009-09-23 11:16:20 -07:00

exports.c

Creds: creds->security can be NULL is selinux is disabled

2009-09-14 12:34:07 +10:00