Re: CVS commit: src/sys

[Jason Thorpe <thorpej%me.com@localhost>]

> On Jul 23, 2019, at 10:07 AM, Jason Thorpe <thorpej%me.com@localhost> wrote:
> 
> 
> 
>> On Jul 23, 2019, at 9:14 AM, Rin Okuyama <rokuyama.rk%gmail.com@localhost> wrote:
>> 
>> Ah, you are right. We leaks uninitialized memory via mmap.
>> 
>> However, I'm not sure that it is safe to write DMA buffer
>> above sc->sc_vramsize after bus_dmamap_load?
>> 
>> Thoughts, ARM experts?

Also, didn't Jared make a change to the Allwinner u-boot configs that ensure the frame buffer is page-aligned?  Should we make that change everywhere?

> 
> Since fundamental memory allocation is done on page boundaries, would it suffice to simply ensure that the "leaked" memory is zero'd out first?  I mean, nothing else can use it for anything meaninful...
> 
> -- thorpej
> 

-- thorpej