As documented in slob.c header, page->private field is used to return accurately the allocated size, through ksize(). Therefore, if one allocates a contiguous set of pages the available size is PAGE_SIZE << order, instead of the requested size. Cc: Pekka Enberg <penberg@xxxxxxxxxx> Cc: Christoph Lameter <cl@xxxxxxxxx> Cc: Glauber Costa <glommer@xxxxxxxxxxxxx> Signed-off-by: Ezequiel Garcia <elezegarcia@xxxxxxxxx> --- mm/slob.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/slob.c b/mm/slob.c index 686e98b..4c89b7d 100644 --- a/mm/slob.c +++ b/mm/slob.c @@ -459,7 +459,7 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node) return NULL; page = virt_to_page(ret); - page->private = size; + page->private = PAGE_SIZE << order; trace_kmalloc_node(_RET_IP_, ret, size, PAGE_SIZE << order, gfp, node); -- 1.7.8.6 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>