From: Suren Baghdasaryan <surenb@google.com>
To: akpm@linux-foundation.org
Cc: kent.overstreet@linux.dev, mhocko@suse.com, vbabka@suse.cz,
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Subject: [PATCH v6 34/37] codetag: debug: mark codetags for reserved pages as empty
Date: Thu, 21 Mar 2024 09:36:56 -0700 [thread overview]
Message-ID: <20240321163705.3067592-35-surenb@google.com> (raw)
In-Reply-To: <20240321163705.3067592-1-surenb@google.com>
To avoid debug warnings while freeing reserved pages which were not
allocated with usual allocators, mark their codetags as empty before
freeing.
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
include/linux/alloc_tag.h | 1 +
include/linux/mm.h | 9 +++++++++
include/linux/pgalloc_tag.h | 2 ++
mm/mm_init.c | 12 +++++++++++-
4 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/include/linux/alloc_tag.h b/include/linux/alloc_tag.h
index c30e6c944353..100ddf66eb8e 100644
--- a/include/linux/alloc_tag.h
+++ b/include/linux/alloc_tag.h
@@ -46,6 +46,7 @@ static inline void set_codetag_empty(union codetag_ref *ref)
#else /* CONFIG_MEM_ALLOC_PROFILING_DEBUG */
static inline bool is_codetag_empty(union codetag_ref *ref) { return false; }
+static inline void set_codetag_empty(union codetag_ref *ref) {}
#endif /* CONFIG_MEM_ALLOC_PROFILING_DEBUG */
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8147b1302413..2615aa69c823 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -5,6 +5,7 @@
#include <linux/errno.h>
#include <linux/mmdebug.h>
#include <linux/gfp.h>
+#include <linux/pgalloc_tag.h>
#include <linux/bug.h>
#include <linux/list.h>
#include <linux/mmzone.h>
@@ -3132,6 +3133,14 @@ extern void reserve_bootmem_region(phys_addr_t start,
/* Free the reserved page into the buddy system, so it gets managed. */
static inline void free_reserved_page(struct page *page)
{
+ if (mem_alloc_profiling_enabled()) {
+ union codetag_ref *ref = get_page_tag_ref(page);
+
+ if (ref) {
+ set_codetag_empty(ref);
+ put_page_tag_ref(ref);
+ }
+ }
ClearPageReserved(page);
init_page_count(page);
__free_page(page);
diff --git a/include/linux/pgalloc_tag.h b/include/linux/pgalloc_tag.h
index 50d212330bbb..62d8dad74b37 100644
--- a/include/linux/pgalloc_tag.h
+++ b/include/linux/pgalloc_tag.h
@@ -120,6 +120,8 @@ static inline void pgalloc_tag_sub_pages(struct alloc_tag *tag, unsigned int nr)
#else /* CONFIG_MEM_ALLOC_PROFILING */
+static inline union codetag_ref *get_page_tag_ref(struct page *page) { return NULL; }
+static inline void put_page_tag_ref(union codetag_ref *ref) {}
static inline void pgalloc_tag_add(struct page *page, struct task_struct *task,
unsigned int nr) {}
static inline void pgalloc_tag_sub(struct page *page, unsigned int nr) {}
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 3e48afcd0faa..c7d6376a180c 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -2510,7 +2510,6 @@ void *__init alloc_large_system_hash(const char *tablename,
void __init memblock_free_pages(struct page *page, unsigned long pfn,
unsigned int order)
{
-
if (IS_ENABLED(CONFIG_DEFERRED_STRUCT_PAGE_INIT)) {
int nid = early_pfn_to_nid(pfn);
@@ -2522,6 +2521,17 @@ void __init memblock_free_pages(struct page *page, unsigned long pfn,
/* KMSAN will take care of these pages. */
return;
}
+
+ /* pages were reserved and not allocated */
+ if (mem_alloc_profiling_enabled()) {
+ union codetag_ref *ref = get_page_tag_ref(page);
+
+ if (ref) {
+ set_codetag_empty(ref);
+ put_page_tag_ref(ref);
+ }
+ }
+
__free_pages_core(page, order);
}
--
2.44.0.291.gc1ea87d7ee-goog
next prev parent reply other threads:[~2024-03-21 16:38 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-21 16:36 [PATCH v6 00/37] Memory allocation profiling Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 01/37] fix missing vmalloc.h includes Suren Baghdasaryan
2024-04-03 21:12 ` Nathan Chancellor
2024-04-03 21:41 ` Kent Overstreet
2024-04-03 21:48 ` David Hildenbrand
2024-04-03 22:57 ` Kent Overstreet
2024-04-04 2:55 ` Randy Dunlap
2024-03-21 16:36 ` [PATCH v6 02/37] asm-generic/io.h: Kill vmalloc.h dependency Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 03/37] mm/slub: Mark slab_free_freelist_hook() __always_inline Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 04/37] scripts/kallysms: Always include __start and __stop symbols Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 05/37] fs: Convert alloc_inode_sb() to a macro Suren Baghdasaryan
2024-03-21 20:31 ` Andrew Morton
2024-03-21 21:13 ` Suren Baghdasaryan
2024-03-21 21:15 ` Kent Overstreet
2024-03-21 22:09 ` Andrew Morton
2024-03-21 22:17 ` Kent Overstreet
2024-03-21 22:47 ` Suren Baghdasaryan
2024-04-04 16:57 ` Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 06/37] mm: introduce slabobj_ext to support slab object extensions Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 07/37] mm: introduce __GFP_NO_OBJ_EXT flag to selectively prevent slabobj_ext creation Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 08/37] mm/slab: introduce SLAB_NO_OBJ_EXT to avoid obj_ext creation Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 09/37] slab: objext: introduce objext_flags as extension to page_memcg_data_flags Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 10/37] lib: code tagging framework Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 11/37] lib: code tagging module support Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 12/37] lib: prevent module unloading if memory is not freed Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 13/37] lib: add allocation tagging support for memory allocation profiling Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 14/37] lib: introduce support for page allocation tagging Suren Baghdasaryan
2024-03-26 3:12 ` Matthew Wilcox
2024-03-26 6:23 ` Suren Baghdasaryan
2024-03-27 3:24 ` Matthew Wilcox
2024-03-27 5:30 ` Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 15/37] lib: introduce early boot parameter to avoid page_ext memory overhead Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 16/37] mm: percpu: increase PERCPU_MODULE_RESERVE to accommodate allocation tags Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 17/37] change alloc_pages name in dma_map_ops to avoid name conflicts Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 18/37] mm: enable page allocation tagging Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 19/37] mm: create new codetag references during page splitting Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 20/37] mm: fix non-compound multi-order memory accounting in __free_pages Suren Baghdasaryan
2024-03-21 16:48 ` Matthew Wilcox
2024-03-21 17:04 ` Matthew Wilcox
2024-03-21 17:19 ` Suren Baghdasaryan
2024-03-21 17:22 ` Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 21/37] mm/page_ext: enable early_page_ext when CONFIG_MEM_ALLOC_PROFILING_DEBUG=y Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 22/37] lib: add codetag reference into slabobj_ext Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 23/37] mm/slab: add allocation accounting into slab allocation and free paths Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 24/37] rust: Add a rust helper for krealloc() Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 25/37] mm/slab: enable slab allocation tagging for kmalloc and friends Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 26/37] mempool: Hook up to memory allocation profiling Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 27/37] mm: percpu: Introduce pcpuobj_ext Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 28/37] mm: percpu: Add codetag reference into pcpuobj_ext Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 29/37] mm: percpu: enable per-cpu allocation tagging Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 30/37] mm: vmalloc: Enable memory allocation profiling Suren Baghdasaryan
2024-03-23 18:05 ` SeongJae Park
2024-03-25 14:56 ` Suren Baghdasaryan
2024-03-25 17:49 ` SeongJae Park
2024-03-25 17:59 ` Suren Baghdasaryan
2024-03-25 18:20 ` SeongJae Park
2024-03-26 7:51 ` Suren Baghdasaryan
2024-03-26 15:39 ` SeongJae Park
2024-04-16 19:27 ` Sourav Panda
2024-03-21 16:36 ` [PATCH v6 31/37] rhashtable: Plumb through alloc tag Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 32/37] lib: add memory allocations report in show_mem() Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 33/37] codetag: debug: skip objext checking when it's for objext itself Suren Baghdasaryan
2024-03-21 16:36 ` Suren Baghdasaryan [this message]
2024-03-21 16:36 ` [PATCH v6 35/37] codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 36/37] MAINTAINERS: Add entries for code tagging and memory allocation profiling Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 37/37] memprofiling: Documentation Suren Baghdasaryan
2024-03-21 20:41 ` [PATCH v6 00/37] Memory allocation profiling Andrew Morton
2024-03-21 21:08 ` Suren Baghdasaryan
2024-04-05 13:37 ` Klara Modin
2024-04-05 14:14 ` Suren Baghdasaryan
2024-04-05 14:30 ` Klara Modin
2024-04-05 15:20 ` Suren Baghdasaryan
2024-04-05 15:37 ` Klara Modin
2024-04-06 21:42 ` Suren Baghdasaryan
2024-04-25 1:59 ` Kees Cook
2024-04-25 3:25 ` Kent Overstreet
2024-04-25 15:39 ` Suren Baghdasaryan
2024-04-25 20:00 ` Kees Cook
2024-04-25 21:35 ` Suren Baghdasaryan
2024-04-25 20:08 ` Kees Cook
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