[PATCH] Avoid taking global tasklist_lock for single threadedprocess at getrusage()
[PATCH] Avoid taking global tasklist_lock for single threadedprocess at getrusage()

Avoid taking the global tasklist_lock when possible, if a process is single
threaded during getrusage().  Any avoidance of tasklist_lock is good for
NUMA boxes (and possibly for large SMPs).  Thanks to Oleg Nesterov for
review and suggestions.

Signed-off-by: Nippun Goel <3ce8638c7ca8d422f3160b3704d4e95837f24222@calsoftinc.com>
Signed-off-by: Ravikiran Thirumalai <974e9e2006ec43d25f7e8b16de63505f31e18473@scalex86.org>
Signed-off-by: Shai Fultheim <600c9aa9903c0092b93aeb0f848189e46fd6854a@scalex86.org>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@osdl.org>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@osdl.org>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs