https://bugs.freedesktop.org/show_bug.cgi?id=107670
--- Comment #18 from Axel Davy <[email protected]> ---
I doubled checked that it is indeed likely to be GTT WC read issue by looking
at the mentionned trace. Some vertex buffers are in GTT WC (but with no memcpy
inside mesa) and some buffers are in VRAM, with the content being filled by
nine with buffer_subdata, which does a memcpy inside radeonsi (it maps the
buffer then does memcpy).
That said, the elements of the default pool are allocated with:
res->domains = RADEON_DOMAIN_VRAM;
res->flags |= RADEON_FLAG_GTT_WC;
So while it lists VRAM for the location, I'm not sure how the flag is used and
if it affects the mapping.
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