linux-stable/security/selinux
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
ss 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
hooks.c do_wait() wakeup optimization: change __wake_up_parent() to use filtered wakeup 2009-09-24 07:20:59 -07:00
Kconfig selinux: Deprecate and schedule the removal of the the compat_net functionality 2008-12-31 12:54:11 -05:00
Makefile SELinux: Add network port SID cache 2008-04-18 20:26:16 +10:00
netif.c SELinux fixups needed for preemptable RCU from -rt 2008-04-22 15:37:23 +10:00
netlabel.c SELinux: Convert avc_audit to use lsm_audit.h 2009-08-17 08:37:18 +10:00
netlink.c SELinux: netlink.c whitespace, syntax, and static declaraction cleanups 2008-04-21 19:05:05 +10:00
netnode.c SELinux: keep the code clean formating and syntax 2008-07-14 15:01:36 +10:00
netport.c SELinux: keep the code clean formating and syntax 2008-07-14 15:01:36 +10:00
nlmsgtab.c SELinux: define audit permissions for audit tree netlink messages 2009-06-03 07:44:53 +10:00
selinuxfs.c selinux: remove obsolete read buffer limit from sel_read_bool 2009-05-19 23:56:11 +10:00
xfrm.c SELinux: Convert avc_audit to use lsm_audit.h 2009-08-17 08:37:18 +10:00