• Frans Pop's avatar
    sched: keep utime/stime monotonic · e823c33c
    Frans Pop authored
    sched: keep utime/stime monotonic
    
    cpustats use utime/stime as a ratio against sum_exec_runtime, as a
    consequence it can happen - when the ratio changes faster than time
    accumulates - that either can be appear to go backwards.
    
    Combined backport for 2.6.23 of the following patches from mainline:
    commit 73a2bcb0
    Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
      sched: keep utime/stime monotonic
    
    commit 9301899b
    Author: Balbir Singh <balbir@linux.vnet.ibm.com>
      sched: fix /proc/<PID>/stat stime/utime monotonicity, part 2
    Signed-off-by: default avatarFrans Pop <elendil@planet.nl>
    CC: Peter Zijlstra <a.p.zijlstra@chello.nl>
    CC: Balbir Singh <balbir@linux.vnet.ibm.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
    e823c33c
array.c 13.1 KB