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| author | Ingo Molnar <mingo@elte.hu> | 2009-02-04 14:54:56 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-04 14:54:56 +0100 |
| commit | bb960a1e42042e82447a5bc0941b3ab6d614bac3 (patch) | |
| tree | d2295a923fabb1b01b25bb015c4c2e42ee9df5ca /kernel/cpuset.c | |
| parent | 858770619debfb9269add63e4ba8b7c6b5538dd1 (diff) | |
| parent | 06fc732c33a7ff5e4c91bcf4a6ca86b5e335ad9a (diff) | |
Merge branch 'core/xen' into x86/urgent
Diffstat (limited to 'kernel/cpuset.c')
| -rw-r--r-- | kernel/cpuset.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 647c77a88fc..f76db9dcaa0 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -61,6 +61,14 @@ #include <linux/cgroup.h> /* + * Workqueue for cpuset related tasks. + * + * Using kevent workqueue may cause deadlock when memory_migrate + * is set. So we create a separate workqueue thread for cpuset. + */ +static struct workqueue_struct *cpuset_wq; + +/* * Tracks how many cpusets are currently defined in system. * When there is only one cpuset (the root cpuset) we can * short circuit some hooks. @@ -568,7 +576,7 @@ update_domain_attr_tree(struct sched_domain_attr *dattr, struct cpuset *c) * load balancing domains (sched domains) as specified by that partial * partition. * - * See "What is sched_load_balance" in Documentation/cpusets.txt + * See "What is sched_load_balance" in Documentation/cgroups/cpusets.txt * for a background explanation of this. * * Does not return errors, on the theory that the callers of this @@ -831,7 +839,7 @@ static DECLARE_WORK(rebuild_sched_domains_work, do_rebuild_sched_domains); */ static void async_rebuild_sched_domains(void) { - schedule_work(&rebuild_sched_domains_work); + queue_work(cpuset_wq, &rebuild_sched_domains_work); } /* @@ -2111,6 +2119,9 @@ void __init cpuset_init_smp(void) hotcpu_notifier(cpuset_track_online_cpus, 0); hotplug_memory_notifier(cpuset_track_online_nodes, 10); + + cpuset_wq = create_singlethread_workqueue("cpuset"); + BUG_ON(!cpuset_wq); } /** |