The patch titled
Subject: mm/z3fold.c: allow __GFP_HIGHMEM in z3fold_alloc
has been added to the -mm tree. Its filename is
mm-z3foldc-allow-__gfp_highmem-in-z3fold_alloc.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-z3foldc-allow-__gfp_highmem-in-z3fold_alloc.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-z3foldc-allow-__gfp_highmem-in-z3fold_alloc.patch
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------------------------------------------------------
From: Henry Burns <henryburns@xxxxxxxxxx>
Subject: mm/z3fold.c: allow __GFP_HIGHMEM in z3fold_alloc
One of the gfp flags used to show that a page is movable is __GFP_HIGHMEM.
Currently z3fold_alloc() fails when __GFP_HIGHMEM is passed. Now that
z3fold pages are movable, we allow __GFP_HIGHMEM. We strip the movability
related flags from the call to kmem_cache_alloc() for our slots since it
is a kernel allocation.
Link: http://lkml.kernel.org/r/20190712222118.108192-1-henryburns@xxxxxxxxxx
Signed-off-by: Henry Burns <henryburns@xxxxxxxxxx>
Acked-by: Vitaly Wool <vitalywool@xxxxxxxxx>
Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/z3fold.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/mm/z3fold.c~mm-z3foldc-allow-__gfp_highmem-in-z3fold_alloc
+++ a/mm/z3fold.c
@@ -196,7 +196,8 @@ static inline struct z3fold_buddy_slots
gfp_t gfp)
{
struct z3fold_buddy_slots *slots = kmem_cache_alloc(pool->c_handle,
- gfp);
+ (gfp & ~(__GFP_HIGHMEM
+ | __GFP_MOVABLE)));
if (slots) {
memset(slots->slot, 0, sizeof(slots->slot));
@@ -853,7 +854,7 @@ static int z3fold_alloc(struct z3fold_po
enum buddy bud;
bool can_sleep = gfpflags_allow_blocking(gfp);
- if (!size || (gfp & __GFP_HIGHMEM))
+ if (!size)
return -EINVAL;
if (size > PAGE_SIZE)
_
Patches currently in -mm which might be from henryburns@xxxxxxxxxx are
mm-z3foldc-allow-__gfp_highmem-in-z3fold_alloc.patch
mm-z3foldc-remove-z3fold_migration-trylock.patch
