[igt-dev] [PATCH i-g-t 0/1] lib/intel_allocator: Limit last page if not reserved

[Jonathan Cavitt <jonathan.cavitt@intel.com>]

We currently limit the last page of the allocator space to avoid a hang
on some platforms when a batch would be pinned in the last page.
However, in the future, we may already be reserving the last page of the
ppgtt in kernel space, so we would not need to limit the last page
because gem_aperture_size would not report its existence in
__intel_allocator_open_full when this is the case.

Check the gtt_size and only limit the last page if it's not already
reserved by kernel space.  This is generalized to if the reported page
count is even.

Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
CC: Nirmoy Das <nirmoy.das@intel.com>
CC: Zbigniew Kempczynski <zbigniew.kempczynski@intel.com>

Jonathan Cavitt (1):
  lib/intel_allocator: Limit last page if not reserved

 lib/intel_allocator.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

-- 
2.25.1