Hello, Linus.
Three more workqueue regression fixes.
* Fix unbalanced unlock in trylock failure path of manage_workers().
This shouldn't happen often in the wild but is possible.
* While making schedule_work() and friends inline, they become
unavailable to !GPL modules. Allow !GPL modules to access basic
stuff - system_wq and queue_*work_on() - so that schedule_work() and
friends can be used.
* During boot, the unbound NUMA support code allocates a cpumask for
each possible node using alloc_cpumask_var_node(), which ends up
trying to allocate node-specific memory even for offline nodes
triggering BUG in the memory alloc code. Use NUMA_NO_NODE for
offline nodes.
The above three fixes are available in the following branch
git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-3.10-fixes
for you to fetch changes up to 1be0c25da56e860992af972a60321563ca2cfcd1:
workqueue: don't perform NUMA-aware allocations on offline nodes in
wq_numa_init() (2013-05-15 14:24:24 -0700)
Thanks.
----------------------------------------------------------------
Joonsoo Kim (1):
workqueue: correct handling of the pool spin_lock
Marc Dionne (1):
workqueue: Make schedule_work() available again to non GPL modules
Tejun Heo (1):
workqueue: don't perform NUMA-aware allocations on offline nodes in
wq_numa_init()
kernel/workqueue.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 1ae6028..ee8e29a 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -296,7 +296,7 @@ static DEFINE_HASHTABLE(unbound_pool_hash,
UNBOUND_POOL_HASH_ORDER);
static struct workqueue_attrs *unbound_std_wq_attrs[NR_STD_WORKER_POOLS];
struct workqueue_struct *system_wq __read_mostly;
-EXPORT_SYMBOL_GPL(system_wq);
+EXPORT_SYMBOL(system_wq);
struct workqueue_struct *system_highpri_wq __read_mostly;
EXPORT_SYMBOL_GPL(system_highpri_wq);
struct workqueue_struct *system_long_wq __read_mostly;
@@ -1411,7 +1411,7 @@ bool queue_work_on(int cpu, struct workqueue_struct *wq,
local_irq_restore(flags);
return ret;
}
-EXPORT_SYMBOL_GPL(queue_work_on);
+EXPORT_SYMBOL(queue_work_on);
void delayed_work_timer_fn(unsigned long __data)
{
@@ -1485,7 +1485,7 @@ bool queue_delayed_work_on(int cpu, struct
workqueue_struct *wq,
local_irq_restore(flags);
return ret;
}
-EXPORT_SYMBOL_GPL(queue_delayed_work_on);
+EXPORT_SYMBOL(queue_delayed_work_on);
/**
* mod_delayed_work_on - modify delay of or queue a delayed work on specific
CPU
@@ -2059,6 +2059,7 @@ static bool manage_workers(struct worker *worker)
if (unlikely(!mutex_trylock(&pool->manager_mutex))) {
spin_unlock_irq(&pool->lock);
mutex_lock(&pool->manager_mutex);
+ spin_lock_irq(&pool->lock);
ret = true;
}
@@ -4904,7 +4905,8 @@ static void __init wq_numa_init(void)
BUG_ON(!tbl);
for_each_node(node)
- BUG_ON(!alloc_cpumask_var_node(&tbl[node], GFP_KERNEL, node));
+ BUG_ON(!alloc_cpumask_var_node(&tbl[node], GFP_KERNEL,
+ node_online(node) ? node : NUMA_NO_NODE));
for_each_possible_cpu(cpu) {
node = cpu_to_node(cpu);
--
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