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aa095871e4
Before we can fully enable 64K pages, we need to first support a 64K scratch page if we intend to support the case where we have object sizes < 2M, since any scratch PTE must also point to a 64K region. Without this our 64K usage is limited to objects which completely fill the page-table, and therefore don't need any scratch. v2: add reminder about why 48b PPGTT Reported-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20171006145041.21673-14-matthew.auld@intel.com Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20171006221833.32439-13-chris@chris-wilson.co.uk |
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