[S390] etr/stp: fix possible deadlock
Precreate stop_machine threads in case the machine supports ETR/STP. Otherwise we might deadlock if a time sync operation gets scheduled and the creation of stop_machine threads would cause disk I/O. This is just the minimal fix. The real fix would be to only precreate stop_machine threads if ETR/STP is actually used. But that would be a rather large and complicated patch. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Родитель
f9a2f797fc
Коммит
179cb81aa1
|
@ -399,8 +399,10 @@ static struct workqueue_struct *time_sync_wq;
|
|||
|
||||
static void __init time_init_wq(void)
|
||||
{
|
||||
if (!time_sync_wq)
|
||||
time_sync_wq = create_singlethread_workqueue("timesync");
|
||||
if (time_sync_wq)
|
||||
return;
|
||||
time_sync_wq = create_singlethread_workqueue("timesync");
|
||||
stop_machine_create();
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
Загрузка…
Ссылка в новой задаче