Messages in this thread | | | Date | Tue, 19 Aug 2008 11:24:53 -0700 | From | "Yinghai Lu" <> | Subject | Re: [PATCH] X86: Change the default value of nr_irqs from 32 to NR_IRQs |
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On Tue, Aug 19, 2008 at 11:13 AM, Alex Nixon (Intern) <Alex.Nixon@citrix.com> wrote: > Yinghai Lu <yhlu.kernel@gmail.com> wrote: >>On Tue, Aug 19, 2008 at 9:55 AM, Alex Nixon <alex.nixon@citrix.com> wrote: >>> >>> If the number of discovered IRQs is suspiciously low, this patch causes >>> the number reported to default to NR_IRQS, rather than 32. NR_IRQS has >>> already been defined to be a >sensible value for the current system (in >>> particular, at least 224 when paravirtualisation is involved). >>> >>if only one ioapic, nr will be 24<<1, you will get 48. Does pv has io apic >> ? >> >>YH >> > I'm not sure about the general case, but Xen does not (Jeremy correct me if > I'm wrong). > > Unless I'm missing something (which I may well be; I'm new to this area of > code), it seems more logical anyway to default back to the calculated > system-specific value (NR_IRQS), instead of 32, which seems rather > arbitrary.
can you try !CONFIG_HAVE_SPARSE_IRQ and CONFIG_HAVE_SPARSE_IRQ ?
YH
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