From: Philippe Gerum <rpm@xenomai.org>
To: Richard Cochran <richardcochran@domain.hid>
Cc: Jan Kiszka <jan.kiszka@domain.hid>, xenomai@xenomai.org
Subject: Re: [Xenomai-help] Stuck MSI in normal Linux driver
Date: Thu, 03 Mar 2011 08:32:28 +0100 [thread overview]
Message-ID: <1299137548.2072.3.camel@domain.hid> (raw)
In-Reply-To: <20110303072147.GA4353@domain.hid>
On Thu, 2011-03-03 at 08:21 +0100, Richard Cochran wrote:
> On Wed, Mar 02, 2011 at 07:18:46PM +0100, Jan Kiszka wrote:
> > On 2011-03-02 16:26, Gilles Chanteperdrix wrote:
> > > Richard Cochran wrote:
> > >> The wiki pages
> > >>
> > >> http://www.xenomai.org/index.php/FAQs
> > >> http://www.xenomai.org/index.php/Configuring_x86_kernels
> > >>
> > >> say not to enable MSI on x86, with a link to a very old (2008)
> > >> discussion.
>
> ...
>
> > The current situation looks like this:
> > - MSI[-X] usage for plain Linux drivers is fine, we are using it on
> > machines where you can hardly avoid MSI today
> > - MSI[-X] usage for RTDM (ie. RT) drivers is basically fine as long as
> > you avoid enabling/disabling from RT context (also used for quite
> > a while here, no known issues under this restriction)
>
> Okay, so I understand from this:
>
> 1. The wiki warning is out of date.
>
> 2. My own PCIe MSI driver/card *should* work.
> (It is not a current known limitation of adeos/xenomai.)
The situation is not that clear. Enabling CONFIG_PCI_MSI on some 83xx
board did cause a lock up at boot for me, so this may point the finger
at the pipeline core for ppc, and not to Xenomai which was barely active
at that stage.
>
> Thanks,
>
> Richard
>
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
--
Philippe.
next prev parent reply other threads:[~2011-03-03 7:32 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-02 15:16 [Xenomai-help] Stuck MSI in normal Linux driver Richard Cochran
2011-03-02 15:26 ` Gilles Chanteperdrix
2011-03-02 15:34 ` Richard Cochran
2011-03-02 15:38 ` Gilles Chanteperdrix
2011-03-02 18:18 ` Jan Kiszka
2011-03-03 7:21 ` Richard Cochran
2011-03-03 7:32 ` Philippe Gerum [this message]
2011-03-03 12:25 ` Wolfgang Grandegger
2011-03-03 12:30 ` Jan Kiszka
2011-03-03 12:54 ` Philippe Gerum
2011-03-03 23:45 ` Jan Kiszka
2011-03-04 7:51 ` Philippe Gerum
2011-03-04 8:09 ` Jan Kiszka
2011-03-04 8:30 ` Richard Cochran
2011-03-04 8:36 ` Jan Kiszka
2011-03-04 8:11 ` Richard Cochran
2011-03-04 8:16 ` Jan Kiszka
2011-03-07 9:26 ` Richard Cochran
2011-03-07 16:37 ` Philippe Gerum
2011-03-07 18:33 ` Richard Cochran
2011-03-08 7:55 ` Richard Cochran
2011-03-07 18:39 ` Gilles Chanteperdrix
2011-03-07 21:47 ` Philippe Gerum
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