Richard Cochran wrote: > I am running Xenomai 2.5 git master on a P2020 with kernel 2.6.36. > > We have a custom PCIe card that raise a MSI, with a normal (not rtdm) > driver. It appears that the interrupt comes just once and then is > stuck. It work under plain Linux, but I cannot rule out a HW timing > bug either. > > 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. I found a newer mail > > https://mail.gna.org/public/xenomai-help/2010-01/msg00095.html > > claiming that MSI is okay.
No. This is my fault. I simply had forgotten that MSI were not OK on x86. > > Is there a known problem with MSI and Xenomai? There is a known problem with MSI on x86 (explained by the FAQ link). > > If so, where/how can I start to get working on fixing it? > > (I don't need the MSI in a rtdm or adeos context.) Given that the problem is that the interrupt controller ack/mask functions (if I recall correctly) need, on x86, to use some Linux primitives which can not be called from Xenomai domain, I am not sure it is easy to fix. And the fact that you do not need the MSI in Xenomai domain does not change anything, since ack/mask routines are called ahead of the pipeline anyway. -- Gilles. _______________________________________________ Xenomai-help mailing list Xenomai-help@gna.org https://mail.gna.org/listinfo/xenomai-help