On 11 October 2012 16:52, Alexander Graf
On 11.10.2012, at 17:50, Andrew Wafaa wrote:
On 11 October 2012 16:47, Alexander Graf
wrote: On 11.10.2012, at 17:45, Guillaume Gardet wrote:
Hi,
Does anybody thought about kernel preemption for ARM boards? It could be usefull since kernel preemption is intended to embedded system or (Low-latency) Desktop.
Moreover, If we want to enable openGL on omap4 (pandaboard), we need a preemptible kernel.
Why?
Is there any objection to move to a preemptible kernel for omap2plus? For other ARM boards? For Factory and/or 12.2?
It usually incurs overhead for not too much perceivable gain. Have you run into latency issues?
Alex
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I would love to see a PreemptRT kernel for openSUSE ARM, mostly as I am doing more PREEMPT_RT work, and it would also be useful for seeing how much of CGL we could comply with. For fear of adding _more_ kernels, could we not have RT kernels in addition to the regular ones - so have say a kernel-omap2plus and a kernel-rt-omap2plus etc?
I'd like to postpone that until we actually can have a -default kernel. Adding a -desktop and -rt flavor would be ok with me by then. But having n*x kernels just doesn't scale well.
Alex
So until there's a unified zImage? That won't be until 3.7 at the earliest, even then it will be for a subset of vendors. It makes sense, just that it isn't that near term. I suppose there's no reason that we couldn't have PREEMPT_RT in a home repo in the mean time. -- Andrew Wafaa IRC: FunkyPenguin GPG: 0x3A36312F -- To unsubscribe, e-mail: opensuse-arm+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-arm+owner@opensuse.org