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Merge branch 'for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

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Pull workqueue update from Tejun Heo:
 "This pull request contains one patch to make an unbound worker pool
  allocated from the NUMA node containing it if such node exists.  As
  unbound worker pools are node-affine by default, this makes most pools
  allocated on the right node"

* 'for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: Allocate the unbound pool using local node memory
This commit is contained in:
Linus Torvalds 2015-11-05 14:16:27 -08:00
commit e25ac7ddaa
1 changed files with 14 additions and 12 deletions
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26
kernel/workqueue.c
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@ -3199,6 +3199,7 @@ static struct worker_pool *get_unbound_pool(const struct workqueue_attrs *attrs)
u32 hash = wqattrs_hash(attrs);
struct worker_pool *pool;
int node;
int target_node = NUMA_NO_NODE;
lockdep_assert_held(&wq_pool_mutex);
@ -3210,13 +3211,25 @@ static struct worker_pool *get_unbound_pool(const struct workqueue_attrs *attrs)
}
}
/* if cpumask is contained inside a NUMA node, we belong to that node */
if (wq_numa_enabled) {
for_each_node(node) {
if (cpumask_subset(attrs->cpumask,
wq_numa_possible_cpumask[node])) {
target_node = node;
break;
}
}
}
/* nope, create a new one */
pool = kzalloc(sizeof(*pool), GFP_KERNEL);
pool = kzalloc_node(sizeof(*pool), GFP_KERNEL, target_node);
if (!pool || init_worker_pool(pool) < 0)
goto fail;
lockdep_set_subclass(&pool->lock, 1); /* see put_pwq() */
copy_workqueue_attrs(pool->attrs, attrs);
pool->node = target_node;
/*
* no_numa isn't a worker_pool attribute, always clear it. See
@ -3224,17 +3237,6 @@ static struct worker_pool *get_unbound_pool(const struct workqueue_attrs *attrs)
*/
pool->attrs->no_numa = false;
/* if cpumask is contained inside a NUMA node, we belong to that node */
if (wq_numa_enabled) {
for_each_node(node) {
if (cpumask_subset(pool->attrs->cpumask,
wq_numa_possible_cpumask[node])) {
pool->node = node;
break;
}
}
}
if (worker_pool_assign_id(pool) < 0)
goto fail;