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xen-devel
Re: [Xen-devel] Re: 1850/2850 hangs under I/O load
Are you sure you fixed up unstable properly, and definitely were
running the fixed up version? It would be quite surprising if that
fix worked for xen2 but not for xen3!
I just did some tests myself, and fixing that one use of set_affinity
in pirq_guest_bind ought to be sufficient to get unstable working on
your boxes.
I also just added a new boot parameter 'noirqbalance' to the
2.0-testing and unstable repositories. If you're using the latest
version of either of those then just add that to Xen's command line
instead of manually patching the code.
You can tell if you have a recent enough source tree:
xen/arch/x86/irq.c will have a new opt_noirqbalance variable declared
right at the top.
I've also checked in automatic disabling of IRQ balancing/affinity in
the unstable tree, so with the latest repository you shouldn't even
have to add an explicit boot parameter.
If you have a serial line attached then you should see Xen print:
XEN: Platform quirk -- Disabling IRQ balancing/affinity.
at some point during boot of domain0.
-- Keir
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