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From: Thomas Gleixner <tglx@linutronix.de>
To: Stanislav Meduna <stano@meduna.org>
Cc: "linux-rt-users@vger.kernel.org" <linux-rt-users@vger.kernel.org>
Subject: Re: hrtimer: interrupt took 6742 ns, then RT throttling and hung machine for nearly 2 seconds
Date: Mon, 15 Apr 2013 14:22:07 +0200 (CEST)	[thread overview]
Message-ID: <alpine.LFD.2.02.1304151416580.21884@ionos> (raw)
In-Reply-To: <516BDE52.90200@meduna.org>

On Mon, 15 Apr 2013, Stanislav Meduna wrote:
> Unfortunately it is not easily reproducible - it happens once
> per several days and there is no obvious trigger.
> 
> Any hints?

Yes, we decoded that problem a week ago. Patch is available here:

http://www.spinics.net/lists/linux-tip-commits/msg19100.html

It's on the way to Linus tree, so it will come via the stable updates
to RT soon.

Thanks,

	tglx

  parent reply	other threads:[~2013-04-15 12:22 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-04-15 11:02 hrtimer: interrupt took 6742 ns, then RT throttling and hung machine for nearly 2 seconds Stanislav Meduna
2013-04-15 11:54 ` Stanislav Meduna
2013-04-15 12:22 ` Thomas Gleixner [this message]
2013-04-15 12:56   ` Stanislav Meduna
2013-04-17 15:46     ` timerfd and softirqd [Was: Re: hrtimer: interrupt took 6742 ns, then RT throttling and hung machine for nearly 2 seconds] Stanislav Meduna
2013-04-18  9:11       ` timerfd read does not return [Was: Re: timerfd and softirqd] Stanislav Meduna
2013-04-19 19:53         ` Stanislav Meduna
2013-04-22  7:35           ` [PATCH] Re: timerfd read does not return Stanislav Meduna
2013-04-22  8:55             ` Stanislav Meduna
2013-04-27  8:34         ` timerfd read does not return - was probably fixed in 3.4.38 Stanislav Meduna
2013-04-28 11:53           ` Carsten Emde
2013-04-29  8:43             ` Stanislav Meduna
2013-05-02 20:02           ` Steven Rostedt
2013-05-10 12:42           ` timerfd read does not return - some traces Stanislav Meduna
2013-05-12 17:31             ` Stanislav Meduna
2013-05-12 23:20             ` timerfd read does not return - hangs inside put_user Stanislav Meduna
2013-05-13  8:05               ` timerfd read does not return - caused by MM fault Stanislav Meduna
2013-05-14  8:31                 ` Livelock in handle_pte_fault [Was: Re: timerfd read does not return] Stanislav Meduna
2013-11-25 10:36                   ` Vijay Katoch

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