On Mon, Sep 15, 2008 at 03:13:32PM +0200, Sebastien Dugue wrote: [...] > > we are a bit worried about putting this into the mainstream part of non real > > time linux. > > Heck, I sure do not want this to be applied mainstream nor into any tree. > The sole purpose of this patch was to trigger some reaction from the people who > know the hardware and try to understand where the problem lies. > > > There interrupts work perfectly fine, and it was a bit of a > > challenge to get there for all cases / configurations / machines. > > Agreed, but the fact that it fails with hardirq preemption leads me to > believe (without any more knowledge about the harware) that there might be > something amiss with this driver (or the code concerning the XICS) > nevertheless. > > > > > Could you try to enable these changes only for RT-Linux via a real-time > > kconfig switch? > > Nope, this is just a quick hack that allows me to have a functional eHEA under > the rt kernel. I want to understand what the problem is: > > - Is the eHEA really delivering level interrupts to the XICS? > > - Is the XICS loosing interrupts when they are masked? There is a known bug in the -rt kernels, the bug causes handlers to lose edge interrupts. See this patch: http://lkml.org/lkml/2008/6/30/372 > - ...? -- Anton Vorontsov email: cbouatmailru@xxxxxxxxx irc://irc.freenode.net/bd2 -- 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
