From: Yafang Shao <laoar.shao@gmail.com>
To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
kafai@fb.com, songliubraving@fb.com, yhs@fb.com,
john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com,
haoluo@google.com, jolsa@kernel.org, tj@kernel.org,
dennis@kernel.org, cl@linux.com, akpm@linux-foundation.org,
penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com,
roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, vbabka@suse.cz,
urezki@gmail.com
Cc: linux-mm@kvack.org, bpf@vger.kernel.org,
Yafang Shao <laoar.shao@gmail.com>
Subject: [PATCH bpf-next 4/7] mm: util: introduce kvsize()
Date: Thu, 2 Feb 2023 01:41:55 +0000 [thread overview]
Message-ID: <20230202014158.19616-5-laoar.shao@gmail.com> (raw)
In-Reply-To: <20230202014158.19616-1-laoar.shao@gmail.com>
Introduce a new help kvsize() to report full size of underlying allocation
of a kmalloc'ed addr or vmalloc'ed addr.
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
include/linux/slab.h | 1 +
mm/util.c | 15 +++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 45af703..cccb4d8 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -762,6 +762,7 @@ static inline __alloc_size(1, 2) void *kvcalloc(size_t n, size_t size, gfp_t fla
extern void *kvrealloc(const void *p, size_t oldsize, size_t newsize, gfp_t flags)
__realloc_size(3);
+extern size_t kvsize(void *addr);
extern void kvfree(const void *addr);
extern void kvfree_sensitive(const void *addr, size_t len);
diff --git a/mm/util.c b/mm/util.c
index b56c92f..f77d0cc 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -610,6 +610,21 @@ void *kvmalloc_node(size_t size, gfp_t flags, int node)
EXPORT_SYMBOL(kvmalloc_node);
/**
+ * kvsize() - Report full size of underlying allocation of adddr
+ * @addr: Pointer to kmalloc'ed or vmalloc'ed memory
+ *
+ * kvsize reports full size of underlying allocation of a kmalloc'ed addr
+ * or a vmalloc'ed addr.
+ */
+size_t kvsize(void *addr)
+{
+ if (is_vmalloc_addr(addr))
+ return vsize(addr);
+
+ return ksize(addr);
+}
+
+/**
* kvfree() - Free memory.
* @addr: Pointer to allocated memory.
*
--
1.8.3.1
next prev parent reply other threads:[~2023-02-02 1:42 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-02 1:41 [PATCH bpf-next 0/7] bpf, mm: bpf memory usage Yafang Shao
2023-02-02 1:41 ` [PATCH bpf-next 1/7] mm: percpu: fix incorrect size in pcpu_obj_full_size() Yafang Shao
2023-02-02 1:41 ` [PATCH bpf-next 2/7] mm: percpu: introduce percpu_size() Yafang Shao
2023-02-02 14:32 ` Christoph Lameter
2023-02-02 15:01 ` Yafang Shao
2023-02-02 1:41 ` [PATCH bpf-next 3/7] mm: vmalloc: introduce vsize() Yafang Shao
2023-02-02 10:23 ` Christoph Hellwig
2023-02-02 14:10 ` Yafang Shao
2023-02-02 1:41 ` Yafang Shao [this message]
2023-02-02 1:41 ` [PATCH bpf-next 5/7] bpf: add new map ops ->map_mem_usage Yafang Shao
2023-02-02 1:41 ` [PATCH bpf-next 6/7] bpf: introduce bpf_mem_alloc_size() Yafang Shao
2023-02-02 4:53 ` kernel test robot
2023-02-02 14:11 ` Yafang Shao
2023-02-02 1:41 ` [PATCH bpf-next 7/7] bpf: hashtab memory usage Yafang Shao
2023-02-04 2:01 ` John Fastabend
2023-02-05 3:55 ` Yafang Shao
2023-02-08 1:56 ` Alexei Starovoitov
2023-02-08 3:33 ` Yafang Shao
2023-02-08 4:29 ` Alexei Starovoitov
2023-02-08 14:22 ` Yafang Shao
2023-02-05 22:14 ` Cong Wang
2023-02-06 11:52 ` Yafang Shao
2023-02-04 2:15 ` [PATCH bpf-next 0/7] bpf, mm: bpf " John Fastabend
2023-02-05 4:03 ` Yafang Shao
2023-02-07 0:48 ` Ho-Ren Chuang
2023-02-07 7:02 ` Yafang Shao
2023-02-07 0:53 ` Ho-Ren Chuang
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