diff options
| author | Mel Gorman <mgorman@suse.de> | 2013-10-07 11:28:54 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-10-09 12:40:19 +0200 |
| commit | 7e8d16b6cbccb2f5da579f5085479fb82ba851b8 (patch) | |
| tree | 3f44d9f893531bed393017824b41fd3814e6e890 | |
| parent | b726b7dfb400c937546fa91cf8523dcb1aa2fc6e (diff) | |
| download | blackbird-op-linux-7e8d16b6cbccb2f5da579f5085479fb82ba851b8.tar.gz blackbird-op-linux-7e8d16b6cbccb2f5da579f5085479fb82ba851b8.zip | |
sched/numa: Initialise numa_next_scan properly
Scan delay logic and resets are currently initialised to start scanning
immediately instead of delaying properly. Initialise them properly at
fork time and catch when a new mm has been allocated.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1381141781-10992-17-git-send-email-mgorman@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | kernel/sched/core.c | 4 | ||||
| -rw-r--r-- | kernel/sched/fair.c | 7 |
2 files changed, 9 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index f575d5bd7e7a..aee7e4dcbbf3 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1624,8 +1624,8 @@ static void __sched_fork(struct task_struct *p) #ifdef CONFIG_NUMA_BALANCING if (p->mm && atomic_read(&p->mm->mm_users) == 1) { - p->mm->numa_next_scan = jiffies; - p->mm->numa_next_reset = jiffies; + p->mm->numa_next_scan = jiffies + msecs_to_jiffies(sysctl_numa_balancing_scan_delay); + p->mm->numa_next_reset = jiffies + msecs_to_jiffies(sysctl_numa_balancing_scan_period_reset); p->mm->numa_scan_seq = 0; } diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 49b11faa2961..0966f0c16f1b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -900,6 +900,13 @@ void task_numa_work(struct callback_head *work) if (p->flags & PF_EXITING) return; + if (!mm->numa_next_reset || !mm->numa_next_scan) { + mm->numa_next_scan = now + + msecs_to_jiffies(sysctl_numa_balancing_scan_delay); + mm->numa_next_reset = now + + msecs_to_jiffies(sysctl_numa_balancing_scan_period_reset); + } + /* * Reset the scan period if enough time has gone by. Objective is that * scanning will be reduced if pages are properly placed. As tasks |
