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 <[email protected]>
slub: use free_page instead of put_page for freeing kmalloc allocation
Cc: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Matt Mackall <[email protected]>
Acked-by: Glauber Costa <[email protected]>
Signed-off-by: Ezequiel Garcia <[email protected]>
Signed-off-by: Pekka Enberg <[email protected]>
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);
