Re: [Xenomai-help] help with xenomai-2.5.0 on pure64bit linux x86_64

[lux-integ <lux-integ@domain.hid>]

On Sunday 31 January 2010 01:22:30 pm Philippe Gerum wrote:
> This is likely our old friend CONFIG_SPARSE_IRQ which is at work. Just
> disable this, until we have introduced the required changes to support
> more than 1024 IRQs.
>
> > [ BTW, if you plan to use some PCI device with DMA under Xenomai,
> > enabling IOMMU is not a good idea. Reprogramming the IOMMU will then
> > become part of the critical path, but that code is not prepared for
> > real-time use. Better disable it during the build or on boot-up. ]

II did all of this   to .config
CONFIG_HPET_TIMER=n
CONFIG_HPET_EMULATE_RTC=n
CONFIG_SPARSE_IRQ=n

and the kernel compiled OK  unfortunately  on booting it   reported 
Kernel Panic - not syncing: VFS: Unable to mount root.....
[ 3.111473 ] Pid: 1, comm: swapper Not tainted 2.6.32.2Xen25F .... then a 
trace.

I had the same response when I disabled the IOMMU stuff

( I suspect this could be  absence  of SATA support though I think I have  
SATA enabled).   Seems  I will have to fiddle a little more with the kernel 
config.

thanks for all your help.

lux-integ