mm/slob: Use free_page instead of put_page for page-size kmalloc allocations
When freeing objects, the slob allocator currently free empty pages
calling __free_pages(). However, page-size kmallocs are disposed
using put_page() instead.
It makes no sense to call put_page() for kernel pages that are provided
by the object allocator, so we shouldn't be doing this ourselves.
This is based on:
commit d9b7f22623b5fa9cc189581dcdfb2ac605933bf4
Author: Glauber Costa <glommer@parallels.com>
slub: use free_page instead of put_page for freeing kmalloc allocation
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Acked-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
diff --git a/mm/slob.c b/mm/slob.c
index fffbc82..e7d7901 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -500,7 +500,7 @@
unsigned int *m = (unsigned int *)(block - align);
slob_free(m, *m + align);
} else
- put_page(sp);
+ __free_pages(sp, compound_order(sp));
}
EXPORT_SYMBOL(kfree);