RT-linux on MIPS..

RT-linux on MIPS..

[Tom Desouza]

Hi all,

Can anyone have tried rt-patches on MIPS architecture ? Is RT-linux works
on MIPS architecture with all features support i.e. PREEMPT_HARDIRQS,
PREEMPT_SOFTIRQ, PREEMPT_RCU?

Thanks,
Tom

Re: RT-linux on MIPS..

[Gaye Abdoulaye Walsimou]

On Tue, 9 Jun 2009 12:48:00 +0530, Tom Desouza <desouza.tom@gmail.com>
wrote:
> Hi all,
> 
> Can anyone have tried rt-patches on MIPS architecture ? Is RT-linux works
> on MIPS architecture with all features support i.e. PREEMPT_HARDIRQS,
> PREEMPT_SOFTIRQ, PREEMPT_RCU?
> 
> Thanks,
> Tom
> --

Tom,

I've asked about MIPS support some weeks ago, the answer was "Support for
MIPS is scheduled for next releases". I think it is not added yet, since
there is no announce about that.
-- 
Gaye Abdoulaye Walsimou WLS

Re: RT-linux on MIPS..

[Vivek Satpute]

Hi,

Could I know the current state of rt-support on MIPS arch ?  When will
it be released with full MIPS support ?
Currently which rt-features MIPS arch supports ?

Any comments will be appreciated.

Thanks and Regards,
Vivek S Satpute
LinSysSoft Technologies

On Tue, Jun 9, 2009 at 4:06 PM, Gaye Abdoulaye Walsimou
<walsimou@walsimou.com> wrote:
>
> On Tue, 9 Jun 2009 12:48:00 +0530, Tom Desouza <desouza.tom@gmail.com>
> wrote:
> > Hi all,
> >
> > Can anyone have tried rt-patches on MIPS architecture ? Is RT-linux works
> > on MIPS architecture with all features support i.e. PREEMPT_HARDIRQS,
> > PREEMPT_SOFTIRQ, PREEMPT_RCU?
> >
> > Thanks,
> > Tom
> > --
>
> Tom,
>
> I've asked about MIPS support some weeks ago, the answer was "Support for
> MIPS is scheduled for next releases". I think it is not added yet, since
> there is no announce about that.
> --
> Gaye Abdoulaye Walsimou WLS
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
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Re: RT-linux on MIPS..

[Thomas Gleixner]

Vivek,

please do _NOT_ toppost. Thanks.

On Tue, 9 Jun 2009, Vivek Satpute wrote:
> Could I know the current state of rt-support on MIPS arch ? When will
> it be released with full MIPS support ?

There have been patches posted on this Mailinglist. I did not come
around yet to go through them and there are pending review issues from
the MIPS maintainter IIRC. If you need MIPS -RT support please grab
the patches and help to get them in shape.

Thanks,

	tglx

Re: RT-linux on MIPS..

[Tony Godshall]

Let me scroogle that for you...

So there is activity back in the early ought's through 2.6.24 fairly recently

1. TimeSys to port Linux/RT to MIPS

      "News, views, articles, and discussion on using Linux in mobile
and embedded devices."
      www.linuxdevices.com/news/NS6948507242.html

2. Lineo contributes MIPS port to RTAI real-time Linux add-on

      "24 Jan 2002 ... News, views, articles, and discussion on using
Linux in mobile and embedded devices."
      www.linuxdevices.com/news/NS6193204523.html

3. 2.6.24-rc2-rt1: msg#00081 linux.rt.user

      "rostedt@gandalf:~/linux-2.6.24-rc2$ tar -xf
patch-2.6.24-rc2-rt1-broken-out.tar. bz2
rostedt@gandalf:~/linux-2.6.24-rc2$ quilt push preempt-realtime-mips.
..."
      osdir.com/ml/linux.rt.user/2007-11/msg00081.html


By the way, this list should not be confused with the proprietary
technology now owned by Wind River

2. RTLinux - Wikipedia, the free encyclopedia

      "15 Apr 2009 ... RTLinux or RTCore (or Real-Time Linux) is a
hard realtime RTOS microkernel that runs the entire Linux operating
system as a fully ..."
      en.wikipedia.org/wiki/RTLinux


Best Regards.



On Tue, Jun 9, 2009 at 12:18 AM, Tom Desouza<desouza.tom@gmail.com> wrote:
> Hi all,
>
> Can anyone have tried rt-patches on MIPS architecture ? Is RT-linux works
> on MIPS architecture with all features support i.e. PREEMPT_HARDIRQS,
> PREEMPT_SOFTIRQ, PREEMPT_RCU?
>
> Thanks,
> Tom
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
--
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Re: RT-linux on MIPS..

[Vivek Satpute]

Hi Thomas,

On Wed, Jun 10, 2009 at 2:45 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
>
> Vivek,
>
> please do _NOT_ toppost. Thanks.
>
> On Tue, 9 Jun 2009, Vivek Satpute wrote:
> > Could I know the current state of rt-support on MIPS arch ? When will
> > it be released with full MIPS support ?
>
> There have been patches posted on this Mailinglist. I did not come
> around yet to go through them and there are pending review issues from
> the MIPS maintainter IIRC. If you need MIPS -RT support please grab
> the patches and help to get them in shape.
>

I searched MIPS specific rt-patches in mailing list upto 27 Jun 2008.
I found only 2 patches
specific to MIPS arch. Posting after 27th Jun 2008 seems to be for
linux-2.6.25.8. I have few
doubts, could you please help me out ?

1) Currently, I am using rt-patches
patch-2.6.29.1-rt9-broken-out.tar.bz2, picked up from
    http://www.kernel.org/pub/linux/kernel/projects/rt/ . It has
patches for MIPS arch also.
    Are all those patches specific to MIPS are tested and working ? I
mean does those
    have any unsolved issues ? Or do I have to test them ?
2) Could I know how many patches posted on mailing list, have been
released so far ?


> Thanks,
>
>        tglx

Thanks,
Vivek
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Re: RT-linux on MIPS..

[Thomas Gleixner]

On Tue, 9 Jun 2009, Tony Godshall wrote:
> 3. 2.6.24-rc2-rt1: msg#00081 linux.rt.user
> 
>       "rostedt@gandalf:~/linux-2.6.24-rc2$ tar -xf
> patch-2.6.24-rc2-rt1-broken-out.tar. bz2
> rostedt@gandalf:~/linux-2.6.24-rc2$ quilt push preempt-realtime-mips.
> ..."
>       osdir.com/ml/linux.rt.user/2007-11/msg00081.html

FYI, both 2.6.24-rt and 2.6.26-rt contain working MIPS support.

The current 2.6.29-rt series does not, as we did not come around to
port it forward. That's still on the todo list but probably will be
pushed into the next 2.6.30 based -rt series.

Thanks,

	tglx

Re: RT-linux on MIPS..

[Thomas Gleixner]

On Wed, 10 Jun 2009, Vivek Satpute wrote:
>
> doubts, could you please help me out ?
> 
> 1) Currently, I am using rt-patches
> patch-2.6.29.1-rt9-broken-out.tar.bz2, picked up from
>     http://www.kernel.org/pub/linux/kernel/projects/rt/ . It has
> patches for MIPS arch also.
>     Are all those patches specific to MIPS are tested and working ? I
> mean does those
>     have any unsolved issues ? Or do I have to test them ?
> 2) Could I know how many patches posted on mailing list, have been
> released so far ?

The MIPS support in 2.6.29-rt is known to be broken. We have been to
busy to fix it. There has been work done by the folks at lemote, but
it needs testing ...

See http://marc.info/?l=linux-rt-users&m=124103397124285&w=2

The 2.6.24-rt and the 2.6.26-rt series contain stable and known to
work MIPS support.

Thanks,

	tglx