[dpdk-dev] [PATCH v2 2/2] mem: unmap unneeded space

Bruce Richardson bruce.richardson at intel.com
Mon Apr 30 14:50:36 CEST 2018


On Mon, Apr 30, 2018 at 12:21:43PM +0100, Anatoly Burakov wrote:
> When we ask to reserve virtual areas, we usually include
> alignment in the mapping size, and that memory ends up
> being wasted. Wasting a gigabyte of VA space while trying to
> reserve one gigabyte is pretty expensive on 32-bit, so after
> we're done mapping, unmap unneeded space.
> 
> Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
> ---
> 
> Notes:
>     v2:
>     - Split fix for size_t overflow into separate patch
>     - Improve readability of unmapping code
>     - Added comment explaining why unmapping is done
> 
Acked-by: Bruce Richardson <bruce.richardson at intel.com>



More information about the dev mailing list