On 15/03/2023 15:28, Kirill A. Shutemov wrote:
On Wed, Mar 15, 2023 at 02:18:52PM +0000, Tvrtko Ursulin wrote:
On 15/03/2023 11:31, Kirill A. Shutemov wrote:
MAX_ORDER is not inclusive: the maximum allocation order buddy allocator
can deliver is MAX_ORDER-1.
This looks to be true on inspection:
__alloc_pages():
..
if (WARN_ON_ONCE_GFP(order >= MAX_ORDER, gfp))
So a bit of a misleading name "max".. For the i915 patch:
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
I don't however see the whole series to understand the context, or how you
want to handle the individual patches. Is it a tree wide cleanup of the same
mistake?
The whole patchset can be seen here:
https://lore.kernel.org/all/20230315113133.11326-1-kirill.shutemov@xxxxxxxxxxxxxxx/
The idea is to fix all MAX_ORDER bugs first and then re-define MAX_ORDER
more sensibly.
Sounds good.
Would you like i915 to take this patch or you will be bringing the whole
lot via some other route? Former is okay and latter should also be fine
for i915 since I don't envisage any conflicts here.
Regards,
Tvrtko
