On 2018-04-30 12:05:52 [+0100], Iain Hunter wrote: > Hi, Hi, > I am using 4.9-rt1 on an Ultrascale+ device which is running Xen. I strongly suggest to use a more recent kernel. > > By default whenever I enable RT Linux then Xen is disabled according > to the patch "arm64/xen: Make XEN depend on !RT" in > > https://marc.info/?l=linux-rt-users&m=144509814328860&w=2 > > > Can someone explain the background to this patch (which appears to > still be in latest 4.14 development release)? > > Is it simply because Xen drivers in the kernel fail to build due to an > include file problem (which I have worked around) > Is there a fundamental stability problem on 64 bit ARM when RT Linux > is running in a DomU? Initial runs of cyclictest don’t show any. I can't find the history behind this. Speaking as of v4.16-RT it builds and I have no XEN setup. If CONFIG_DEBUG_PREEMPT, CONFIG_DEBUG_ATOMIC_SLEEP and lockdep isn't complaining then I might drop that patch with your tested-by :) > Thanks, > > Iain Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
