Comment # 50
on bug 93649
from Matthew Dawson
(In reply to Marek Olšák from comment #49) > (In reply to Marek Olšák from comment #48) > > Does this fix the hangs? > > https://cgit.freedesktop.org/mesa/mesa/commit/ > > ?id=d4d9ec55c589156df4edc227a86b4a8c41048d58 > > > > It changes the HTILE (HyperZ) allocation function to > > r600_aligned_buffer_create. Without that, the hardware can hang on big GPUs > > (Tahiti/Pitcairn/Hawaii/Tonga/etc), but not APUs or small GPUs. The hang > > happens when TTM decides to move HTILE to a different location with an > > unaligned physical address (which is pretty random). The hardware tries to > > access the unaligned address and boom. > > Actually, I think that commit only affects Hawaii and Fiji. Other GPUs might > be unaffected, which means the Tahiti hangs are due to a different bug. I've previously tried disabling hyperz on Tahiti with no luck in side stepping this bug, so I don't think this is the issue. Could there be other buffers that need similar treatment that are being ignored? Is there an easy way to test this locally?
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