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Zero number of CPUs should be translated into the default number of

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CPUs when allocating a LinuxKPI workqueue. This also ensures that the
created taskqueue always have a non-zero number of worker threads.

MFC after:		1 week
Sponsored by:		Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2017-04-19 11:38:07 +00:00
parent 5657848913
commit 7a742c41cf
1 changed files with 11 additions and 0 deletions
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11
sys/compat/linuxkpi/common/src/linux_work.c
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@ -57,6 +57,8 @@ struct workqueue_struct *system_long_wq;
struct workqueue_struct *system_unbound_wq;
struct workqueue_struct *system_power_efficient_wq;
static int linux_default_wq_cpus = 4;
static void linux_delayed_work_timer_fn(void *);
/*
@ -497,6 +499,12 @@ linux_create_workqueue_common(const char *name, int cpus)
{
struct workqueue_struct *wq;
/*
* If zero CPUs are specified use the default number of CPUs:
*/
if (cpus == 0)
cpus = linux_default_wq_cpus;
wq = kmalloc(sizeof(*wq), M_WAITOK | M_ZERO);
wq->taskqueue = taskqueue_create(name, M_WAITOK,
taskqueue_thread_enqueue, &wq->taskqueue);
@ -537,6 +545,9 @@ linux_work_init(void *arg)
if (max_wq_cpus < 4)
max_wq_cpus = 4;
/* set default number of CPUs */
linux_default_wq_cpus = max_wq_cpus;
linux_system_short_wq = alloc_workqueue("linuxkpi_short_wq", 0, max_wq_cpus);
linux_system_long_wq = alloc_workqueue("linuxkpi_long_wq", 0, max_wq_cpus);