On Tue, Feb 02, 2021 at 08:19:54AM -0800, Alexander Duyck wrote:
> On Sat, Jan 30, 2021 at 11:54 PM Kevin Hao wrote:
> >
> > In the current implementation of page_frag_alloc(), it doesn't have
> > any align guarantee for the returned buffer address. But for some
> > hardwares they do require the D
On Sat, Jan 30, 2021 at 11:54 PM Kevin Hao wrote:
>
> In the current implementation of page_frag_alloc(), it doesn't have
> any align guarantee for the returned buffer address. But for some
> hardwares they do require the DMA buffer to be aligned correctly,
> so we would have to use some workaroun
On Tue, Feb 02, 2021 at 12:48:28PM +0100, Vlastimil Babka wrote:
> On 2/2/21 12:36 PM, Ioana Ciornei wrote:
> > On Sun, Jan 31, 2021 at 03:44:23PM +0800, Kevin Hao wrote:
> >> In the current implementation of page_frag_alloc(), it doesn't have
> >> any align guarantee for the returned buffer addres
On 2/2/21 12:36 PM, Ioana Ciornei wrote:
> On Sun, Jan 31, 2021 at 03:44:23PM +0800, Kevin Hao wrote:
>> In the current implementation of page_frag_alloc(), it doesn't have
>> any align guarantee for the returned buffer address. But for some
>> hardwares they do require the DMA buffer to be aligned
On Sun, Jan 31, 2021 at 03:44:23PM +0800, Kevin Hao wrote:
> In the current implementation of page_frag_alloc(), it doesn't have
> any align guarantee for the returned buffer address. But for some
> hardwares they do require the DMA buffer to be aligned correctly,
> so we would have to use some wor
In the current implementation of page_frag_alloc(), it doesn't have
any align guarantee for the returned buffer address. But for some
hardwares they do require the DMA buffer to be aligned correctly,
so we would have to use some workarounds like below if the buffers
allocated by the page_frag_alloc
