Re: [Xen-devel] [timer/ticks related] dom0 hang during boot on large 1TB system

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 22/12/2009 07:59, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote:

>> For wrapping, unsigned comparision must be done, which is also the jiffies
>> data type. 
> 
> If you do 32-bit unsigned comparisons, that is broken by jiffies wrapping,
> the fixing of which was the whole point of the comparison macros.

I'm talking about '(ulong)b<(ulong)a' here of course. '(ulong)b-(ulong)a<0'
would always be false, which is even less useful.

 -- Keir



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