From: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: <linux-kernel@vger.kernel.org>, Tejun Heo <tj@kernel.org>,
Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>,
"Gu, Zheng" <guz.fnst@cn.fujitsu.com>,
tangchen <tangchen@cn.fujitsu.com>
Subject: Re: [PATCH 3/4] workqueue: remove per-node unbound pool when node goes offline.
Date: Mon, 15 Dec 2014 11:06:20 +0900 [thread overview]
Message-ID: <548E421C.50305@jp.fujitsu.com> (raw)
In-Reply-To: <548E4215.6090709@cn.fujitsu.com>
(2014/12/15 11:06), Lai Jiangshan wrote:
> On 12/14/2014 12:35 AM, Kamezawa Hiroyuki wrote:
>> remove node aware unbound pools if node goes offline.
>>
>> scan unbound workqueue and remove numa affine pool when
>> a node goes offline.
>>
>> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
>> ---
>> kernel/workqueue.c | 29 +++++++++++++++++++++++++++++
>> 1 file changed, 29 insertions(+)
>>
>> diff --git a/kernel/workqueue.c b/kernel/workqueue.c
>> index 35f4f00..07b4eb5 100644
>> --- a/kernel/workqueue.c
>> +++ b/kernel/workqueue.c
>> @@ -4921,11 +4921,40 @@ early_initcall(init_workqueues);
>> * cached pools per cpu should be freed at node unplug
>> */
>>
>> +/*
>> + * Replace per-node pwq with dfl_pwq because this node disappers.
>> + * The new pool will be set at CPU_ONLINE by wq_update_unbound_numa.
>> + */
>> +static void wq_release_unbound_numa(struct workqueue_struct *wq, int nid)
>> +{
>> + struct pool_workqueue *old_pwq = NULL;
>> +
>> + if (!wq_numa_enabled || !(wq->flags & WQ_UNBOUND))
>> + return;
>> + mutex_lock(&wq->mutex);
>> + if (wq->unbound_attrs->no_numa)
>> + goto out_unlock;
>> + spin_lock_irq(&wq->dfl_pwq->pool->lock);
>> + get_pwq(wq->dfl_pwq);
>> + spin_unlock_irq(&wq->dfl_pwq->pool->lock);
>> + old_pwq = numa_pwq_tbl_install(wq, nid, wq->dfl_pwq);
>> +out_unlock:
>> + mutex_unlock(&wq->mutex);
>> + put_pwq_unlocked(old_pwq);
>> + return;
>> +}
>
>
> We have already did it in wq_update_unbound_numa().
>
Ah, hm. CPU_OFFLINE event does this, ok.
Thanks,
-Kame
>> +
>> void workqueue_register_numanode(int nid)
>> {
>> }
>>
>> void workqueue_unregister_numanode(int nid)
>> {
>> + struct workqueue_struct *wq;
>> +
>> + mutex_lock(&wq_pool_mutex);
>> + list_for_each_entry(wq, &workqueues, list)
>> + wq_release_unbound_numa(wq, nid);
>> + mutex_unlock(&wq_pool_mutex);
>> }
>> #endif
>
next prev parent reply other threads:[~2014-12-15 2:06 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-12 10:19 [PATCH 0/5] workqueue: fix bug when numa mapping is changed Lai Jiangshan
2014-12-12 10:19 ` [PATCH 1/5] workqueue: fix memory leak in wq_numa_init() Lai Jiangshan
2014-12-12 17:12 ` Tejun Heo
2014-12-15 5:25 ` Lai Jiangshan
2014-12-12 10:19 ` [PATCH 2/5] workqueue: update wq_numa_possible_cpumask Lai Jiangshan
2014-12-12 17:18 ` Tejun Heo
2014-12-15 2:02 ` Lai Jiangshan
2014-12-25 20:16 ` Tejun Heo
2014-12-18 2:22 ` Lai Jiangshan
2014-12-12 10:19 ` [PATCH 3/5] workqueue: fixup existing pool->node Lai Jiangshan
2014-12-12 17:25 ` Tejun Heo
2014-12-15 1:23 ` Lai Jiangshan
2014-12-25 20:14 ` Tejun Heo
2015-01-13 7:08 ` Lai Jiangshan
2015-01-13 15:24 ` Tejun Heo
2014-12-12 10:19 ` [PATCH 4/5] workqueue: update NUMA affinity for the node lost CPU Lai Jiangshan
2014-12-12 17:27 ` Tejun Heo
2014-12-15 1:28 ` Lai Jiangshan
2014-12-25 20:17 ` Tejun Heo
2014-12-12 10:19 ` [PATCH 5/5] workqueue: retry on NUMA_NO_NODE when create_worker() fails Lai Jiangshan
2014-12-12 16:05 ` KOSAKI Motohiro
2014-12-12 17:29 ` KOSAKI Motohiro
2014-12-12 17:29 ` Tejun Heo
2014-12-12 17:13 ` [PATCH 0/5] workqueue: fix bug when numa mapping is changed Yasuaki Ishimatsu
2014-12-15 1:34 ` Lai Jiangshan
2014-12-18 1:50 ` Yasuaki Ishimatsu
2014-12-13 16:27 ` [PATCH 0/4] workqueue: fix bug when numa mapping is changed v2 Kamezawa Hiroyuki
2014-12-13 16:30 ` [PATCH 1/4] workqueue: add a hook for node hotplug Kamezawa Hiroyuki
2014-12-13 16:33 ` [PATCH 2/4] workqueue: add warning if pool->node is offline Kamezawa Hiroyuki
2014-12-13 16:35 ` [PATCH 3/4] workqueue: remove per-node unbound pool when node goes offline Kamezawa Hiroyuki
2014-12-15 2:06 ` Lai Jiangshan
2014-12-15 2:06 ` Kamezawa Hiroyuki [this message]
2014-12-13 16:38 ` [PATCH 4/4] workqueue: handle change in cpu-node relationship Kamezawa Hiroyuki
2014-12-15 2:12 ` Lai Jiangshan
2014-12-15 2:20 ` Kamezawa Hiroyuki
2014-12-15 2:48 ` Lai Jiangshan
2014-12-15 2:55 ` Kamezawa Hiroyuki
2014-12-15 3:30 ` Lai Jiangshan
2014-12-15 3:34 ` Lai Jiangshan
2014-12-15 4:04 ` Kamezawa Hiroyuki
2014-12-15 5:19 ` Lai Jiangshan
2014-12-15 5:33 ` Kamezawa Hiroyuki
2014-12-15 11:11 ` [PATCH 0/4] workqueue: fix memory allocation after numa mapping is changed v3 Kamezawa Hiroyuki
2014-12-15 11:14 ` [PATCH 1/4] workqueue:Fix unbound workqueue's node affinity detection Kamezawa Hiroyuki
2014-12-16 5:30 ` Lai Jiangshan
2014-12-16 7:32 ` Kamezawa Hiroyuki
2014-12-16 7:54 ` Lai Jiangshan
2014-12-15 11:16 ` [PATCH 2/4] workqueue: update per-cpu workqueue's node affinity at,online-offline Kamezawa Hiroyuki
2014-12-16 5:32 ` Lai Jiangshan
2014-12-16 7:25 ` Kamezawa Hiroyuki
2014-12-15 11:18 ` [PATCH 3/4] workqueue: Update workqueue's possible cpumask when a new node, coming up Kamezawa Hiroyuki
2014-12-16 7:49 ` Lai Jiangshan
2014-12-16 8:10 ` Kamezawa Hiroyuki
2014-12-16 8:18 ` Kamezawa Hiroyuki
2014-12-15 11:22 ` [PATCH 4/4] workqueue: Handle cpu-node affinity change at CPU_ONLINE Kamezawa Hiroyuki
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