Re: [Xen-devel] 2.6.30 dom0 Xen patches

[Boris Derzhavets <bderzhavets@xxxxxxxxx>]

Two replacements CONFIG_SPARSE_IRQ by CONFIG_GENERIC_HARDIRQS

60035_xen3-patch-2.6.29.patch1 line 11568

+#ifdef CONFIG_SPARSE_IRQ
+ irq_to_desc(irq)->kstat_irqs[cpu] = 0;
+#else
kstat_cpu(cpu).irqs[irq] = 0;

60036_xen3-patch-2.6.30.patch1 line 18283

+#ifdef CONFIG_SPARSE_IRQ
+int __init arch_probe_nr_irqs(void)
+{
+ int nr;
+
+ if (nr_irqs > (NR_VECTORS * nr_cpu_ids))
+ nr_irqs = NR_VECTORS * nr_cpu_ids;

in 2.6.30 Andy's patch set allows to build working xenified 2.6.30.1 kernel
been tested on Q9550,C2D E8400 boxes.

Boris.

--- On Fri, 7/10/09, Jan Beulich <JBeulich@xxxxxxxxxx> wrote:

From: Jan Beulich <JBeulich@xxxxxxxxxx>
Subject: Re: [Xen-devel] 2.6.30 dom0 Xen patches
To: "Andrew Lyon" <andrew.lyon@xxxxxxxxx>, "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
Cc: "Xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Date: Friday, July 10, 2009, 8:52 AM

>>> Boris Derzhavets <bderzhavets@xxxxxxxxx> 10.07.09 14:40 >>>
>I still believe in 60035_xen3-patch-2.6.29.patch1 line 11568 
>
>+#ifdef CONFIG_SPARSE_IRQ
>+                       irq_to_desc(irq)->kstat_irqs[cpu] = 0;
>+#else
>                        kstat_cpu(cpu).irqs[irq] = 0;
>
>causes a problem.

Sure - that's what I keep telling you: This needs to be replaced by
CONFIG_GENERIC_HARDIRQS in the .30 patch.

Oh, I think I now understand what you first did: You apparently replaced
the *other* +#ifdef CONFIG_SPARSE_IRQ in the .30 patch - that's wrong.
You need to make the .30 patch *additionally* make the change indicated
above. (Of course, you could do that in the .29 patch right away, but then
your .29 patch will no longer properly reflect what's needed for that version
to build and/or work right.)

Jan


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