Re: [Xen-devel] [PATCH v3] use INT64_MAX as max expiration

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Fri, 16 Mar 2012, Zhang, Yang Z wrote:
> Change from v2:
> Correct the logic when calculating icount.
> 
> Change from v1:
> According to Jan and Stefano's comments, drop the previous logic which 
> setting the value in an arbitrary way and use Stefano's suggestion instead.
> 
> Currently, the max expiration time is 2147483647ns(INT32_MAX ns). This is 
> enough when guest is busy, but when guest is idle, the next timer will be 
> later than INT32_MAX ns. And those meaningless alarm will harm the pkg 
> C-state.
> 
> PS: Since the overflow will not happen with the expression((delta / 1000) + 
> (delta % 1000 > 0 ? 1 : 0)), so i also removed the comments" To avoid 
> problems with overflow limit this to 2^32."
> 
> Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>


Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>


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