Messages in this thread | | | Date | Thu, 07 Feb 2008 12:53:43 -0800 | From | "H. Peter Anvin" <> | Subject | Re: 2.6.24 says "serial8250: too much work for irq4" a lot. |
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Rob Landley wrote: > > Specifically, qemu isn't paravirtualized, it's fully virtualized. The same > kernel can run on real hardware just fine. (Sort of the point of the > project...) > > I can yank the warning for the kernels I build (or set PASS_LIMIT to 9999999), > but I'd rather not carry any more patches than I can avoid... >
The right thing to do is to add virtual FIFO exhaustion into the Qemu device model. It really isn't a valid emulation of a UART that it has an infinite FIFO behind it that can flood the interrupt handler for an arbitrary number of fetches.
I was going to give a technical description of how to do it here, but then I realized I might as well just write it up as a patch. Stay tuned.
-hpa
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