mempool: hook up to memory allocation profiling

This adds hooks to mempools for correctly annotating mempool-backed
allocations at the correct source line, so they show up correctly in
/sys/kernel/debug/allocations.

Various inline functions are converted to wrappers so that we can invoke
alloc_hooks() in fewer places.

[surenb@google.com: undo _noprof additions in the documentation]
  Link: https://lkml.kernel.org/r/20240326231453.1206227-4-surenb@google.com
[surenb@google.com: add missing mempool_create_node documentation]
  Link: https://lkml.kernel.org/r/20240402180835.1661905-1-surenb@google.com
Link: https://lkml.kernel.org/r/20240321163705.3067592-27-surenb@google.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Tested-by: Kees Cook <keescook@chromium.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alex Gaynor <alex.gaynor@gmail.com>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Andreas Hindborg <a.hindborg@samsung.com>
Cc: Benno Lossin <benno.lossin@proton.me>
Cc: "Björn Roy Baron" <bjorn3_gh@protonmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Gary Guo <gary@garyguo.net>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wedson Almeida Filho <wedsonaf@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 35 insertions, 38 deletions

diff --git a/include/linux/mempool.h b/include/linux/mempool.h
index 16c5cc807ff6..7b151441341b 100644
--- a/include/linux/mempool.h
+++ b/include/linux/mempool.h
@@ -5,6 +5,8 @@
 #ifndef _LINUX_MEMPOOL_H
 #define _LINUX_MEMPOOL_H
 
+#include <linux/sched.h>
+#include <linux/alloc_tag.h>
 #include <linux/wait.h>
 #include <linux/compiler.h>
 
@@ -39,18 +41,32 @@ void mempool_exit(mempool_t *pool);
 int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
 		      mempool_free_t *free_fn, void *pool_data,
 		      gfp_t gfp_mask, int node_id);
-int mempool_init(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
+
+int mempool_init_noprof(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
 		 mempool_free_t *free_fn, void *pool_data);
+#define mempool_init(...)						\
+	alloc_hooks(mempool_init_noprof(__VA_ARGS__))
 
 extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
 			mempool_free_t *free_fn, void *pool_data);
-extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
+
+extern mempool_t *mempool_create_node_noprof(int min_nr, mempool_alloc_t *alloc_fn,
 			mempool_free_t *free_fn, void *pool_data,
 			gfp_t gfp_mask, int nid);
+#define mempool_create_node(...)					\
+	alloc_hooks(mempool_create_node_noprof(__VA_ARGS__))
+
+#define mempool_create(_min_nr, _alloc_fn, _free_fn, _pool_data)	\
+	mempool_create_node(_min_nr, _alloc_fn, _free_fn, _pool_data,	\
+			    GFP_KERNEL, NUMA_NO_NODE)
 
 extern int mempool_resize(mempool_t *pool, int new_min_nr);
 extern void mempool_destroy(mempool_t *pool);
-extern void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask) __malloc;
+
+extern void *mempool_alloc_noprof(mempool_t *pool, gfp_t gfp_mask) __malloc;
+#define mempool_alloc(...)						\
+	alloc_hooks(mempool_alloc_noprof(__VA_ARGS__))
+
 extern void *mempool_alloc_preallocated(mempool_t *pool) __malloc;
 extern void mempool_free(void *element, mempool_t *pool);
 
@@ -62,19 +78,10 @@ extern void mempool_free(void *element, mempool_t *pool);
 void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
 void mempool_free_slab(void *element, void *pool_data);
 
-static inline int
-mempool_init_slab_pool(mempool_t *pool, int min_nr, struct kmem_cache *kc)
-{
-	return mempool_init(pool, min_nr, mempool_alloc_slab,
-			    mempool_free_slab, (void *) kc);
-}
-
-static inline mempool_t *
-mempool_create_slab_pool(int min_nr, struct kmem_cache *kc)
-{
-	return mempool_create(min_nr, mempool_alloc_slab, mempool_free_slab,
-			      (void *) kc);
-}
+#define mempool_init_slab_pool(_pool, _min_nr, _kc)			\
+	mempool_init(_pool, (_min_nr), mempool_alloc_slab, mempool_free_slab, (void *)(_kc))
+#define mempool_create_slab_pool(_min_nr, _kc)			\
+	mempool_create((_min_nr), mempool_alloc_slab, mempool_free_slab, (void *)(_kc))
 
 /*
  * a mempool_alloc_t and a mempool_free_t to kmalloc and kfree the
@@ -83,17 +90,12 @@ mempool_create_slab_pool(int min_nr, struct kmem_cache *kc)
 void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data);
 void mempool_kfree(void *element, void *pool_data);
 
-static inline int mempool_init_kmalloc_pool(mempool_t *pool, int min_nr, size_t size)
-{
-	return mempool_init(pool, min_nr, mempool_kmalloc,
-			    mempool_kfree, (void *) size);
-}
-
-static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size)
-{
-	return mempool_create(min_nr, mempool_kmalloc, mempool_kfree,
-			      (void *) size);
-}
+#define mempool_init_kmalloc_pool(_pool, _min_nr, _size)		\
+	mempool_init(_pool, (_min_nr), mempool_kmalloc, mempool_kfree,	\
+		     (void *)(unsigned long)(_size))
+#define mempool_create_kmalloc_pool(_min_nr, _size)			\
+	mempool_create((_min_nr), mempool_kmalloc, mempool_kfree,	\
+		       (void *)(unsigned long)(_size))
 
 void *mempool_kvmalloc(gfp_t gfp_mask, void *pool_data);
 void mempool_kvfree(void *element, void *pool_data);
@@ -115,16 +117,11 @@ static inline mempool_t *mempool_create_kvmalloc_pool(int min_nr, size_t size)
 void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data);
 void mempool_free_pages(void *element, void *pool_data);
 
-static inline int mempool_init_page_pool(mempool_t *pool, int min_nr, int order)
-{
-	return mempool_init(pool, min_nr, mempool_alloc_pages,
-			    mempool_free_pages, (void *)(long)order);
-}
-
-static inline mempool_t *mempool_create_page_pool(int min_nr, int order)
-{
-	return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages,
-			      (void *)(long)order);
-}
+#define mempool_init_page_pool(_pool, _min_nr, _order)			\
+	mempool_init(_pool, (_min_nr), mempool_alloc_pages,		\
+		     mempool_free_pages, (void *)(long)(_order))
+#define mempool_create_page_pool(_min_nr, _order)			\
+	mempool_create((_min_nr), mempool_alloc_pages,			\
+		       mempool_free_pages, (void *)(long)(_order))
 
 #endif /* _LINUX_MEMPOOL_H */