12 Nov
2014
12 Nov
'14
12:49 a.m.
On Tue, 11 Nov 2014 18:36:28 -0600 (CST) Christoph Lameter cl@linux.com wrote:
On Tue, 11 Nov 2014, Andrew Morton wrote:
There's no point in doing
#define GFP_SLAB_BUG_MASK (__GFP_DMA32|__GFP_HIGHMEM|~__GFP_BITS_MASK)
because __GFP_DMA32|__GFP_HIGHMEM are already part of ~__GFP_BITS_MASK.
?? ~__GFP_BITS_MASK means bits 25 to 31 are set.
__GFP_DMA32 is bit 2 and __GFP_HIGHMEM is bit 1.
Ah, yes, OK.
I suppose it's possible that __GFP_HIGHMEM was set.
do_huge_pmd_anonymous_page ->pte_alloc_one ->alloc_pages(__userpte_alloc_gfp==__GFP_HIGHMEM)
but I haven't traced that through and that's 32-bit.
But anyway - Luke, please attach your .config to https://bugzilla.kernel.org/show_bug.cgi?id=87891?