Question regarding RT patches for ARM
Hi All, I am working on custom i.MX6 quad hardware and using RT patches for almost latest stable kernel 4.9 and facing some weird system stall OR 'unhandled page fault - exceptions'. Just want to confirm that "are RT patches for ARM are stable OR they are still experimental?" As I heard from my other colleagues that RT patches are not stable for ARM and should be avoided. Thanks in advance, -- Fawad Lateef
Which rt patch do you mean? 发自网易邮箱大师 On 05/15/2017 20:44, Fawad Lateef wrote: Hi All, I am working on custom i.MX6 quad hardware and using RT patches for almost latest stable kernel 4.9 and facing some weird system stall OR 'unhandled page fault - exceptions'. Just want to confirm that "are RT patches for ARM are stable OR they are still experimental?" As I heard from my other colleagues that RT patches are not stable for ARM and should be avoided. Thanks in advance, -- Fawad Lateef _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Hi, I am talking in general about RT patches. Like downloaded 4.9.20 from kernel.org and applied patch "4.9.20-rt16.patch". Thanks -- Fawad Lateef On 15 May 2017 at 14:51, GuJiangfei <qiledexin@163.com> wrote:
Which rt patch do you mean?
发自网易邮箱大师 On 05/15/2017 20:44, Fawad Lateef wrote:
Hi All,
I am working on custom i.MX6 quad hardware and using RT patches for almost latest stable kernel 4.9 and facing some weird system stall OR 'unhandled page fault - exceptions'.
Just want to confirm that "are RT patches for ARM are stable OR they are still experimental?" As I heard from my other colleagues that RT patches are not stable for ARM and should be avoided.
Thanks in advance,
-- Fawad Lateef
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
On 2017-05-15 15:09:45 [+0200], Fawad Lateef wrote:
Hi,
I am talking in general about RT patches. Like downloaded 4.9.20 from kernel.org and applied patch "4.9.20-rt16.patch".
understood
On 15 May 2017 at 14:51, GuJiangfei <qiledexin@163.com> wrote:
Which rt patch do you mean?
发自网易邮箱大师 On 05/15/2017 20:44, Fawad Lateef wrote:
Hi All,
I am working on custom i.MX6 quad hardware and using RT patches for almost latest stable kernel 4.9 and facing some weird system stall OR 'unhandled page fault - exceptions'.
and you are sure that this problems are caused by the RT patch or is there a chance that this is unrelated to the RT patch?
Just want to confirm that "are RT patches for ARM are stable OR they are still experimental?" As I heard from my other colleagues that RT patches are not stable for ARM and should be avoided.
It is stable and I am not aware of any ARM / IMX specific problems. Since this got here from kernelnewbies: I would not recommend the Preempt-RT patch set to add to any kernel just to have fancy patches. People use it because they need to fulfill specific requirements which would not work without it. You might want to check some of the documentation in the RT-wiki https://wiki.linuxfoundation.org/realtime/documentation/start
Thanks in advance,
-- Fawad Lateef
Sebastian
Hi Fawad,
发自网易邮箱大师 On 05/15/2017 20:44, Fawad Lateef wrote:
Hi All,
I am working on custom i.MX6 quad hardware and using RT patches for almost latest stable kernel 4.9 and facing some weird system stall OR 'unhandled page fault - exceptions'.
I'm not sure about the unhandled page fault, but the stalls may be because of the SDMA driver. See this patch in the Freescale/NXP community for kernel 4.1: https://github.com/Freescale/meta-freescale/blob/master/recipes-kernel/linux... Regards, Eric
Fawad, [CC'ing RT experts] On Mon, May 15, 2017 at 2:44 PM, Fawad Lateef <fawadlateef@gmail.com> wrote:
Hi All,
I am working on custom i.MX6 quad hardware and using RT patches for almost latest stable kernel 4.9 and facing some weird system stall OR 'unhandled page fault - exceptions'.
Just want to confirm that "are RT patches for ARM are stable OR they are still experimental?" As I heard from my other colleagues that RT patches are not stable for ARM and should be avoided.
-- Thanks, //richard
participants (5)
-
Eric Nelson -
Fawad Lateef -
GuJiangfei -
Richard Weinberger -
Sebastian Andrzej Siewior