From: Jan Kiszka <jan.kiszka@domain.hid>
To: Philippe Gerum <rpm@xenomai.org>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>,
Tschaeche IT-Services <services@domain.hid>
Subject: Re: [Xenomai-core] [PATCH] Mayday support
Date: Tue, 06 Jul 2010 19:10:11 +0200 [thread overview]
Message-ID: <4C336373.6010805@domain.hid> (raw)
In-Reply-To: <1278434466.1939.8.camel@domain.hid>
Philippe Gerum wrote:
> On Tue, 2010-07-06 at 17:54 +0200, Jan Kiszka wrote:
>>>> CONFIG_XENO_OPT_WATCHDOG=y
>>>> CONFIG_XENO_OPT_WATCHDOG_TIMEOUT=60
>>> 60s seems way too long to have a chance of recovering from a runaway
>>> loop to a reasonably sane state.
>> That's required for debugging the kernel.
>>
>
> I don't understand this requirement. Any insight?
While you step though a Xenomai task context, timers continue to tick.
So the period spent in that context gets huge, and soon the task will be
shot by the watchdog. Likely a limitation of kvm (interrupts should be
blockable in singlestep mode). Haven't looked at all details yet, just
picked the lazy workaround.
Of course, we don't use this value on real HW.
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2010-07-06 17:10 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-02 17:19 [Xenomai-core] [RFC] Break out of endless user space loops Jan Kiszka
2010-06-02 17:30 ` Gilles Chanteperdrix
2010-06-03 6:55 ` Jan Kiszka
2010-06-03 8:27 ` Philippe Gerum
2010-06-03 8:47 ` Jan Kiszka
2010-06-03 9:56 ` Philippe Gerum
2010-06-03 10:18 ` Jan Kiszka
2010-06-03 10:47 ` Philippe Gerum
2010-06-03 10:52 ` Philippe Gerum
2010-06-03 10:59 ` Jan Kiszka
2010-06-02 20:58 ` Philippe Gerum
2010-06-03 6:56 ` Jan Kiszka
2010-06-09 10:41 ` [Xenomai-core] [PATCH] Mayday support (was: Re: [RFC] Break out of endless user space loops) Philippe Gerum
2010-06-09 13:38 ` [Xenomai-help] " Tschaeche IT-Services
2010-06-09 14:01 ` Philippe Gerum
2010-06-09 18:11 ` Tschaeche IT-Services
2010-06-18 23:11 ` [Xenomai-core] " Philippe Gerum
2010-06-24 9:22 ` [Xenomai-help] " Tschaeche IT-Services
2010-06-24 9:34 ` [Xenomai-core] [PATCH] Mayday support Jan Kiszka
2010-06-24 10:28 ` [Xenomai-core] [PATCH] Mayday support (was: Re: [RFC] Break out of endless user space loops) Philippe Gerum
2010-06-24 12:05 ` [Xenomai-core] [PATCH] Mayday support Jan Kiszka
2010-06-27 16:01 ` Philippe Gerum
2010-06-28 14:06 ` Jan Kiszka
2010-06-28 14:12 ` Philippe Gerum
2010-07-06 15:44 ` Philippe Gerum
2010-07-06 15:54 ` Jan Kiszka
2010-07-06 16:41 ` Philippe Gerum
2010-07-06 17:10 ` Jan Kiszka [this message]
2010-08-20 12:32 ` Jan Kiszka
2010-08-20 14:00 ` Philippe Gerum
2010-08-20 14:06 ` Jan Kiszka
2010-08-20 14:20 ` Philippe Gerum
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