]> git.karo-electronics.de Git - linux-beck.git/commit
mm/mmu_notifier: init notifier if necessary
authorGavin Shan <shangw@linux.vnet.ibm.com>
Mon, 8 Oct 2012 23:29:26 +0000 (16:29 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 9 Oct 2012 07:22:23 +0000 (16:22 +0900)
commite0f3c3f78da29b114e7c1c68019036559f715948
tree0f052b6e1708bbcafc0097d328d5013b161542e2
parent21a92735f660eaecf69a6f2e777f18463760ec32
mm/mmu_notifier: init notifier if necessary

While registering MMU notifier, new instance of MMU notifier_mm will be
allocated and later free'd if currrent mm_struct's MMU notifier_mm has
been initialized.  That causes some overhead.  The patch tries to
elominate that.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Sagi Grimberg <sagig@mellanox.co.il>
Cc: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/mmu_notifier.c