[Christoph Lameter - Wed, Oct 22, 2008 at 11:10:56AM -0700]On Wed, 22 Oct 2008, Cyrill Gorcunov wrote:
+#define OO_SHIFT 16
+#define OO_MASK ((1 << OO_SHIFT) - 1)
+#define MAX_OBJS_PER_PAGE 65535 /* see struct page.objects */
This is == OO_MASK right? Otherwise things will break when we change
OO_SHIFT.
Yes, I set it 65535 directly to distinguish it from OO_MASK
meaning not value and point to page.objects since they are
u16. Which meant that is the point where all limits start.
So it we set OO_SHIFT to say 14 it will not be a problem
but if we exceed 16 bits it will break SLUB. Am I right?
(I become scratching the head :)