diff options
| author | Honglei Wang <wanghonglei@didichuxing.com> | 2022-01-13 14:39:20 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-01-27 12:57:18 +0100 |
| commit | 12bf8a7eb84e4d3547ebfd89bb0a9255a0f2acc7 (patch) | |
| tree | cf406039f0c4b2745dd05ed8e55a8b845a299ae7 /kernel/sched/fair.c | |
| parent | sched/debug: Remove mpol_get/put and task_lock/unlock from sched_show_numa (diff) | |
| download | linux-12bf8a7eb84e4d3547ebfd89bb0a9255a0f2acc7.tar.xz linux-12bf8a7eb84e4d3547ebfd89bb0a9255a0f2acc7.zip | |
sched/numa: initialize numa statistics when forking new task
The child processes will inherit numa_pages_migrated and
total_numa_faults from the parent. It means even if there is no numa
fault happen on the child, the statistics in /proc/$pid of the child
process might show huge amount. This is a bit weird. Let's initialize
them when do fork.
Signed-off-by: Honglei Wang <wanghonglei@didichuxing.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Link: https://lore.kernel.org/r/20220113133920.49900-1-wanghonglei@didichuxing.com
Diffstat (limited to 'kernel/sched/fair.c')
| -rw-r--r-- | kernel/sched/fair.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 095b0aa378df..5dca13ff89f2 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2825,6 +2825,8 @@ void init_numa_balancing(unsigned long clone_flags, struct task_struct *p) /* Protect against double add, see task_tick_numa and task_numa_work */ p->numa_work.next = &p->numa_work; p->numa_faults = NULL; + p->numa_pages_migrated = 0; + p->total_numa_faults = 0; RCU_INIT_POINTER(p->numa_group, NULL); p->last_task_numa_placement = 0; p->last_sum_exec_runtime = 0; |