tree e151f5d5ae0e9cb361e91a08c4d0fb8a7171b8ce
parent 5e8869bb699d50be5c0733edfc71cfcd5b43e10a
author Ingo Molnar <mingo@elte.hu> 1196108509 +0100
committer Ingo Molnar <mingo@elte.hu> 1196108509 +0100

sched: fix prev_stime calculation

Srivatsa Vaddagiri noticed occasionally incorrect CPU usage
values in top and tracked it down to stime going below 0 in
task_stime(). Negative values are possible there due to the
sampled nature of stime/utime.

Fix suggested by Balbir Singh.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Reviewed-by: Balbir Singh <balbir@linux.vnet.ibm.com>