The patch titled
SLUB's ksize() fails for size > 2048
has been removed from the -mm tree. Its filename was
slubs-ksize-fails-for-size-2048.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: SLUB's ksize() fails for size > 2048
From: "Vegard Nossum" <vegard.nossum@xxxxxxxxx>
I can't pass memory allocated by kmalloc() to ksize() if it is allocated by
SLUB allocator and size is larger than (I guess) PAGE_SIZE / 2.
The error of ksize() seems to be that it does not check if the allocation
was made by SLUB or the page allocator.
Reviewed-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Tested-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>, Matt Mackall <mpm@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff -puN mm/slub.c~slubs-ksize-fails-for-size-2048 mm/slub.c
--- a/mm/slub.c~slubs-ksize-fails-for-size-2048
+++ a/mm/slub.c
@@ -2558,8 +2558,12 @@ size_t ksize(const void *object)
if (unlikely(object == ZERO_SIZE_PTR))
return 0;
- page = get_object_page(object);
+ page = virt_to_head_page(object);
BUG_ON(!page);
+
+ if (unlikely(!PageSlab(page)))
+ return PAGE_SIZE << compound_order(page);
+
s = page->slab;
BUG_ON(!s);
_
Patches currently in -mm which might be from vegard.nossum@xxxxxxxxx are
origin.patch
git-kbuild.patch
fat-fix-printk-format-strings.patch
-
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