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mm: percpu: add codetag reference into pcpuobj_ext

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To store codetag for every per-cpu allocation, a codetag reference is
embedded into pcpuobj_ext when CONFIG_MEM_ALLOC_PROFILING=y.  Hooks to use
the newly introduced codetag are added.

Link: https://lkml.kernel.org/r/20240321163705.3067592-29-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>
This commit is contained in:
Kent Overstreet 2024-03-21 09:36:50 -07:00 committed by Andrew Morton
parent 8f30d2660a
commit 60fa4a9e23
2 changed files with 35 additions and 2 deletions
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11
mm/percpu-internal.h
View File

@ -36,9 +36,12 @@ struct pcpuobj_ext {
#ifdef CONFIG_MEMCG_KMEM
struct obj_cgroup *cgroup;
#endif
#ifdef CONFIG_MEM_ALLOC_PROFILING
union codetag_ref tag;
#endif
};
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG_KMEM) || defined(CONFIG_MEM_ALLOC_PROFILING)
#define NEED_PCPUOBJ_EXT
#endif
@ -86,7 +89,11 @@ struct pcpu_chunk {
static inline bool need_pcpuobj_ext(void)
{
return !mem_cgroup_kmem_disabled();
if (IS_ENABLED(CONFIG_MEM_ALLOC_PROFILING))
return true;
if (!mem_cgroup_kmem_disabled())
return true;
return false;
}
extern spinlock_t pcpu_lock;

26
mm/percpu.c
View File

@ -1699,6 +1699,32 @@ static void pcpu_memcg_free_hook(struct pcpu_chunk *chunk, int off, size_t size)
}
#endif /* CONFIG_MEMCG_KMEM */
#ifdef CONFIG_MEM_ALLOC_PROFILING
static void pcpu_alloc_tag_alloc_hook(struct pcpu_chunk *chunk, int off,
size_t size)
{
if (mem_alloc_profiling_enabled() && likely(chunk->obj_exts)) {
alloc_tag_add(&chunk->obj_exts[off >> PCPU_MIN_ALLOC_SHIFT].tag,
current->alloc_tag, size);
}
}
static void pcpu_alloc_tag_free_hook(struct pcpu_chunk *chunk, int off, size_t size)
{
if (mem_alloc_profiling_enabled() && likely(chunk->obj_exts))
alloc_tag_sub(&chunk->obj_exts[off >> PCPU_MIN_ALLOC_SHIFT].tag, size);
}
#else
static void pcpu_alloc_tag_alloc_hook(struct pcpu_chunk *chunk, int off,
size_t size)
{
}
static void pcpu_alloc_tag_free_hook(struct pcpu_chunk *chunk, int off, size_t size)
{
}
#endif
/**
* pcpu_alloc - the percpu allocator
* @size: size of area to allocate in bytes