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authorSuren Baghdasaryan <surenb@google.com>2024-03-21 09:36:28 -0700
committerAndrew Morton <akpm@linux-foundation.org>2024-04-25 20:55:51 -0700
commit21c690a349baab895dc68ab70d291e1598d7109d (patch)
tree82ca71d908032c63dcab9b82679ba73cf16ffc23 /include/linux/mm_types.h
parentfs: convert alloc_inode_sb() to a macro (diff)
downloadwireguard-linux-21c690a349baab895dc68ab70d291e1598d7109d.tar.xz
wireguard-linux-21c690a349baab895dc68ab70d291e1598d7109d.zip
mm: introduce slabobj_ext to support slab object extensions
Currently slab pages can store only vectors of obj_cgroup pointers in page->memcg_data. Introduce slabobj_ext structure to allow more data to be stored for each slab object. Wrap obj_cgroup into slabobj_ext to support current functionality while allowing to extend slabobj_ext in the future. Link: https://lkml.kernel.org/r/20240321163705.3067592-7-surenb@google.com Signed-off-by: Suren Baghdasaryan <surenb@google.com> Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> 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: Kent Overstreet <kent.overstreet@linux.dev> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: Wedson Almeida Filho <wedsonaf@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/mm_types.h')
-rw-r--r--include/linux/mm_types.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 5240bd7bca33..4ae4684d1add 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -169,7 +169,7 @@ struct page {
/* Usage count. *DO NOT USE DIRECTLY*. See page_ref.h */
atomic_t _refcount;
-#ifdef CONFIG_MEMCG
+#ifdef CONFIG_SLAB_OBJ_EXT
unsigned long memcg_data;
#endif
@@ -331,7 +331,7 @@ struct folio {
};
atomic_t _mapcount;
atomic_t _refcount;
-#ifdef CONFIG_MEMCG
+#ifdef CONFIG_SLAB_OBJ_EXT
unsigned long memcg_data;
#endif
#if defined(WANT_PAGE_VIRTUAL)