RE: Kernel 2.6.31.6 pv_ops freeze on start, No available IRQ to bind to, increase nr_irqs!

[Fantu <fantonifabio@tiscali.it>]

now work also with CONFIG_SPARSE_IRQ=n and also with
0001-x86-ioapic-Remove-the-hack-for-calculating-nr_irq_ :-(

Fantu wrote:
> 
> i have recompile on xen/master updated (necessary for gfx test) but not
> work now i try with CONFIG_SPARSE_IRQ=n
> the config use is:  http://old.nabble.com/file/p27792293/.config .config 
> 
> Zhang, Xiantao wrote:
>> 
>> 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@citrix.com>
>>>> 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@citrix.com>
>>>>     Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
>>>>     Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
>>>>     Signed-off-by: Jeremy Fitzhardinge
>>>> <jeremy.fitzhardinge@citrix.com> 
>>>> 
>>>> If that doesn't help then try setting CONFIG_SPARSE_IRQ to n.
>>>> 
>>>> Ian.
>> 
>> 
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>> 
>> 
> 
> 

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