Messages in this thread | | | Date | Fri, 26 Apr 2013 10:41:37 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH RT v2] x86/mce: Defer mce wakeups to threads for PREEMPT_RT |
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* Steven Rostedt | 2013-04-11 14:33:34 [-0400]:
>As wait queue locks are notorious for long hold times, we can not >convert them to raw_spin_locks without causing issues with -rt. But >Thomas has created a "simple-wait" structure that uses raw spin locks >which may have been a good fit. > >Unfortunately, wait queues are not the only issue, as the mce_notify_irq >also does a schedule_work(), which grabs the workqueue spin locks that >have the exact same issue.
mce_notify_irq() can use simple_waitqueue, no? The other issue is that mce_report_event() is scheduling a per-cpu workqueue (mce_schedule_work) in case of a memory fault. This has the same issue.
Sebastian
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