From: Philippe Gerum <rpm@xenomai.org>
To: Lennart Sorensen <lsorense@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-core] CONFIG_XENO_HW_UNLOCKED_SWITCH=y causes random process corruption in xenomai 2.6.0 on powerpc.
Date: Fri, 23 Dec 2011 22:48:29 +0100 [thread overview]
Message-ID: <4EF4F72D.5010007@domain.hid> (raw)
In-Reply-To: <20111223202530.GO27742@domain.hid>
On 12/23/2011 09:25 PM, Lennart Sorensen wrote:
> On Fri, Dec 23, 2011 at 09:08:11PM +0100, Philippe Gerum wrote:
>> Do you have a typical test scenario which triggers this bug?
>
> It can take a couple of hours under pretty heavy load to get one
> occourance. But with preemptible context swiches off we haven't seen
> any in a week.
>
> For sure xenomai tasks are handling interrupts quite a lot at the time.
>
> I wish we had a simple test case to show it, but it seems to require
> triggering an interrupt in the middle of a context switch at exactly
> the wrong place.
>
Is it reproducible with the basic latency or cyclic tests if waiting for
long enough? Running ltp in parallel would trigger a decent load, but
sometimes two shell loops forking commands in the background are enough
to trigger a variety of issues when something fragile exists in the mmu
layer as modified by the I-Pipe.
--
Philippe.
next prev parent reply other threads:[~2011-12-23 21:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-23 17:33 [Xenomai-core] CONFIG_XENO_HW_UNLOCKED_SWITCH=y causes random process corruption in xenomai 2.6.0 on powerpc Lennart Sorensen
2011-12-23 18:17 ` Philippe Gerum
2011-12-23 18:32 ` Lennart Sorensen
2011-12-23 20:08 ` Philippe Gerum
2011-12-23 20:25 ` Lennart Sorensen
2011-12-23 21:48 ` Philippe Gerum [this message]
2011-12-23 21:55 ` Lennart Sorensen
2011-12-23 21:58 ` Philippe Gerum
2012-01-04 13:34 ` Philippe Gerum
2018-03-21 15:40 ` [Xenomai] " Frank Benkert
2018-03-21 16:40 ` Philippe Gerum
2018-03-22 7:22 ` Frank Benkert
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