git: kernel - Fix MP race in vmspace_president_count()
commit 87882e126b762d0175ced26c8e2337af315e510a
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Thu Mar 24 23:25:05 2011 -0700
kernel - Fix MP race in vmspace_president_count()
* We must get at least a shared vm_map lock in order to scan the
vm_map_entry list.
* Cache the totaled value and use it for repeated requests within one
second or if the vm_map lock could not be acquired non-blocking.
* The bug being fixed could be triggered by top.
Summary of changes:
sys/vm/vm_map.h | 27 +++++++++++++++++++++++----
1 files changed, 23 insertions(+), 4 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/87882e126b762d0175ced26c8e2337af315e510a
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