Jorge Almeida wrote: > Hi to all. > > I'm starting to work with rtnet 0.9.4 and i have a machine with a SIS900 NIC > and 3 realtek 8139too NICs, eth0 to eth3 respectively, and when i insert > rtnet the 3 realtek will became rteth0 to rteth2 respectively. > The problem is that i also loose the eth0 capability. > > I think the problem is related with the IRQ sharing between eth0 and rteth1, > because they share the same interrupt. > > If the driver rt_8139too.ko has the rt_pend_to_linux feature this should not > happen? Right?
Nope, there is no easy, common way of sharing IRQs between RT-safe and standard, non-RT-safe device drivers. I'm speaking very abstractly here as this issues is independent of the RT-extension (Xenomai, RTAI, Preempt-RT, ...), it's a common design issue. See e.g. this posting for a short explanation (there are a "few" threads on this topic out there...): https://mail.gna.org/public/xenomai-core/2006-08/msg00186.html You either have to pick one device and leave the other alone (use the "cards" module parameter to control the RTnet driver) or you enhance the RT-driver with shared-IRQ support (fairly easy today) and arrange the device mapping that sharing only takes place in the RT space. The third way is the hardest one: write an RT-safe stub for the non-RT device that handles the IRQ quickly by disabling it in the device's hardware until Linux executes again. Jan
signature.asc
Description: OpenPGP digital signature
------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
