Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"Fix a division by zero bug that can trigger in the NUMA placement
code"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/numa: Fix a possible divide-by-zero
+4
+4
kernel/sched/fair.c
+4
kernel/sched/fair.c
···
2007
2007
if (p->last_task_numa_placement) {
2008
2008
delta = runtime - p->last_sum_exec_runtime;
2009
2009
*period = now - p->last_task_numa_placement;
2010
+
2011
+
/* Avoid time going backwards, prevent potential divide error: */
2012
+
if (unlikely((s64)*period < 0))
2013
+
*period = 0;
2010
2014
} else {
2011
2015
delta = p->se.avg.load_sum;
2012
2016
*period = LOAD_AVG_MAX;