RE: [Xen-devel] Kernel 2.6.31.6 pv_ops freeze on start, No available IRQ to bind to, increase nr_irqs!

["Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>]

Fantu wrote:
> I have try xen/master with CONFIG_SPARSE_IRQ=n and reverse of your
> patch but nothing, after i try xen/stable with CONFIG_SPARSE_IRQ=n
> and apply patch
> 0001-x86-ioapic-Remove-the-hack-for-calculating-nr_irq_ from another
> post and work... finally xen 4 with kernel pv_ops work on  Dell T610
> :jumping:  

Have you tried CONFIG_SPARSE_IRQ=y with this patch ?  I think it should work as 
well. 
Xiantao 


> Ian Campbell-10 wrote:
>> 
>> On Mon, 2010-03-01 at 10:45 +0000, Fantu wrote:
>>> i have problem more before...
>>> CONFIG_SPARSE_IRQ=y on all .config i have used, i can change to n
>>> and try or must set to y?
>> 
>> Try reverting this first:
>> 
>> commit 68458a366412dbbfa726dbdd403e94be5ac10a69
>> Author: Ian Campbell <ian.campbell@xxxxxxxxxx>
>> Date:   Fri Feb 26 10:59:35 2010 +0000
>> 
>>     xen: fix off-by-one error in find_unbound_irq
>> 
>>     e459de95 "Find an unbound irq number in reverse order (high to
>>     low)" introduced an off by one error which would cause repeated
>>     allocations of the nr_irq'th IRQ if there are no spare
>> interrupts (i.e. get_nr_hw_irqs() == nr_irqs). 
>> 
>>     Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
>>     Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
>>     Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
>>     Signed-off-by: Jeremy Fitzhardinge
>> <jeremy.fitzhardinge@xxxxxxxxxx> 
>> 
>> If that doesn't help then try setting CONFIG_SPARSE_IRQ to n.
>> 
>> Ian.


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