Re: [PATCH RT v2] x86/mce: Defer mce wakeups to threads for PREEMPT_RT

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



* 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
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [RT Stable]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]

  Powered by Linux