Commen=
t # 14
on bug 84662<=
/a>
from Andy Furniss
(In reply to Michel D=C3=A4nzer from comment #12)
> Created attachment 107391 [details] [review] [review]
> Make Mesa behave as if the kernel was older
>=20
> (In reply to Andy Furniss from =
comment #3)
> > gallium hud on bad showing different vram gtt usage
>=20
> That's very interesting indeed =E2=80=94 on the 'good' screenshot, req=
uested and
> actual VRAM usage match up almost perfectly, but on the 'bad' one, the=
re's a
> large discrepancy.
>=20
> With a current kernel, does the bad behaviour start with the same Mesa
> commit as the Unigine stutters?
>=20
> The attached patch makes Mesa behave the same with current kernels as =
it
> does with older ones which don't have the bisected commit. Does that a=
void
> the problem?
More testing - incomplete but will post initial findings as I don't know wh=
en
I'll finish.
I managed to get older mesa to build with new llvm by applying the build fi=
xes.
With mesa on the commit before
r600g,radeonsi: Set RADEON_GEM_NO_CPU_ACCESS flag for tiled BOs
(I don't know yet exactly what mesa commit changed things)
I can with your patch or the stream revert get "good" behavior, t=
his was with a
kernel on the "bad" HPD kernel commit.
Will test more over time.