From: Christoph Hellwig
> Sent: 04 May 2020 17:03
>
> On Sun, May 03, 2020 at 09:20:19PM +0100, Chris Wilson wrote:
> > > Err, why does i915 implements its own uncached memcpy instead of relying
> > > on core functionality to start with?
> >
> > What is this core functionality that provides movntq
On Sun, May 3, 2020 at 2:30 PM Chris Wilson wrote:
>
> Quoting Jason A. Donenfeld (2020-04-30 23:10:16)
> > Sometimes it's not okay to use SIMD registers, the conditions for which
> > have changed subtly from kernel release to kernel release. Usually the
> > pattern is to check for may_use_simd()
Quoting Jason A. Donenfeld (2020-04-30 23:10:16)
> Sometimes it's not okay to use SIMD registers, the conditions for which
> have changed subtly from kernel release to kernel release. Usually the
> pattern is to check for may_use_simd() and then fallback to using
> something slower in the unlikely
Quoting Christoph Hellwig (2020-05-01 19:07:31)
> On Thu, Apr 30, 2020 at 04:10:16PM -0600, Jason A. Donenfeld wrote:
> > Sometimes it's not okay to use SIMD registers, the conditions for which
> > have changed subtly from kernel release to kernel release. Usually the
> > pattern is to check for ma
On Fri, May 1, 2020 at 4:42 AM Sebastian Andrzej Siewior
wrote:
>Reviewed-by: Sebastian Andrzej Siewior
Thanks.
>
> May I ask how large the memcpy can be? I'm asking in case it is large
> and an explicit rescheduling point might be needed.
Yea I was worried about that too. I'm not an i915
On Fri, May 1, 2020 at 12:07 PM Christoph Hellwig wrote:
>
> On Thu, Apr 30, 2020 at 04:10:16PM -0600, Jason A. Donenfeld wrote:
> > Sometimes it's not okay to use SIMD registers, the conditions for which
> > have changed subtly from kernel release to kernel release. Usually the
> > pattern is to
From: Sebastian Andrzej Siewior
> Sent: 01 May 2020 11:42
> On 2020-04-30 16:10:16 [-0600], Jason A. Donenfeld wrote:
> > Sometimes it's not okay to use SIMD registers, the conditions for which
> > have changed subtly from kernel release to kernel release. Usually the
> > pattern is to check for ma
On 2020-04-30 16:10:16 [-0600], Jason A. Donenfeld wrote:
> Sometimes it's not okay to use SIMD registers, the conditions for which
> have changed subtly from kernel release to kernel release. Usually the
> pattern is to check for may_use_simd() and then fallback to using
> something slower in the
