> On Jul 23, 2019, at 10:07 AM, Jason Thorpe <thor...@me.com> wrote: > > > >> On Jul 23, 2019, at 9:14 AM, Rin Okuyama <rokuyama...@gmail.com> 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
