[PATCH 2/2] cxl: Fix allocating a minimum of 2 pages for the SPA

[Frederic Barrat]

Le 29/06/2016 14:16, Ian Munsie a écrit :
> From: Ian Munsie <imunsie at au1.ibm.com>
>
> The Scheduled Process Area is allocated dynamically with enough pages to
> fit at least as many processes as the AFU descriptor indicated. Since
> the calculation is non-trivial, it does this by calculating how many
> processes could fit in an allocation of a given order, and increasing
> that order until it can fit enough processes or hits the maximum
> supported size.
>
> Currently, it will start this search using a SPA of 2 pages instead of
> 1. This can waste a page of memory if the AFU's maximum number of
> supported processes was small enough to fit in one page.
>
> Fix the algorithm to start the search at 1 page.
>
> Signed-off-by: Ian Munsie <imunsie at au1.ibm.com>


Reviewed-by: Frederic Barrat <fbarrat at linux.vnet.ibm.com>