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Tue, 24 Oct 2023 06:47:05 -0700 (PDT) Date: Tue, 24 Oct 2023 06:46:08 -0700 In-Reply-To: <20231024134637.3120277-1-surenb@google.com> Mime-Version: 1.0 References: <20231024134637.3120277-1-surenb@google.com> X-Mailer: git-send-email 2.42.0.758.gaed0368e0e-goog Message-ID: <20231024134637.3120277-12-surenb@google.com> Subject: [PATCH v2 11/39] slab: objext: introduce objext_flags as extension to page_memcg_data_flags From: Suren Baghdasaryan To: akpm@linux-foundation.org Cc: kent.overstreet@linux.dev, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, roman.gushchin@linux.dev, mgorman@suse.de, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, corbet@lwn.net, void@manifault.com, peterz@infradead.org, juri.lelli@redhat.com, ldufour@linux.ibm.com, catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, peterx@redhat.com, david@redhat.com, axboe@kernel.dk, mcgrof@kernel.org, masahiroy@kernel.org, nathan@kernel.org, dennis@kernel.org, tj@kernel.org, muchun.song@linux.dev, rppt@kernel.org, paulmck@kernel.org, pasha.tatashin@soleen.com, yosryahmed@google.com, yuzhao@google.com, dhowells@redhat.com, hughd@google.com, andreyknvl@gmail.com, keescook@chromium.org, ndesaulniers@google.com, vvvvvv@google.com, gregkh@linuxfoundation.org, ebiggers@google.com, ytcoode@gmail.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, bristot@redhat.com, vschneid@redhat.com, cl@linux.com, penberg@kernel.org, iamjoonsoo.kim@lge.com, 42.hyeyoo@gmail.com, glider@google.com, elver@google.com, dvyukov@google.com, shakeelb@google.com, songmuchun@bytedance.com, jbaron@akamai.com, rientjes@google.com, minchan@google.com, kaleshsingh@google.com, surenb@google.com, kernel-team@android.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, kasan-dev@googlegroups.com, cgroups@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Introduce objext_flags to store additional objext flags unrelated to memcg. Signed-off-by: Suren Baghdasaryan --- include/linux/memcontrol.h | 29 ++++++++++++++++++++++------- mm/slab.h | 4 +--- 2 files changed, 23 insertions(+), 10 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 4b17ebb7e723..f3ede28b6fa6 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -354,7 +354,22 @@ enum page_memcg_data_flags { __NR_MEMCG_DATA_FLAGS =3D (1UL << 2), }; =20 -#define MEMCG_DATA_FLAGS_MASK (__NR_MEMCG_DATA_FLAGS - 1) +#define __FIRST_OBJEXT_FLAG __NR_MEMCG_DATA_FLAGS + +#else /* CONFIG_MEMCG */ + +#define __FIRST_OBJEXT_FLAG (1UL << 0) + +#endif /* CONFIG_MEMCG */ + +enum objext_flags { + /* the next bit after the last actual flag */ + __NR_OBJEXTS_FLAGS =3D __FIRST_OBJEXT_FLAG, +}; + +#define OBJEXTS_FLAGS_MASK (__NR_OBJEXTS_FLAGS - 1) + +#ifdef CONFIG_MEMCG =20 static inline bool folio_memcg_kmem(struct folio *folio); =20 @@ -388,7 +403,7 @@ static inline struct mem_cgroup *__folio_memcg(struct f= olio *folio) VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio); VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio); =20 - return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); } =20 /* @@ -409,7 +424,7 @@ static inline struct obj_cgroup *__folio_objcg(struct f= olio *folio) VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio); VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio); =20 - return (struct obj_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + return (struct obj_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); } =20 /* @@ -466,11 +481,11 @@ static inline struct mem_cgroup *folio_memcg_rcu(stru= ct folio *folio) if (memcg_data & MEMCG_DATA_KMEM) { struct obj_cgroup *objcg; =20 - objcg =3D (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + objcg =3D (void *)(memcg_data & ~OBJEXTS_FLAGS_MASK); return obj_cgroup_memcg(objcg); } =20 - return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); } =20 /* @@ -509,11 +524,11 @@ static inline struct mem_cgroup *folio_memcg_check(st= ruct folio *folio) if (memcg_data & MEMCG_DATA_KMEM) { struct obj_cgroup *objcg; =20 - objcg =3D (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + objcg =3D (void *)(memcg_data & ~OBJEXTS_FLAGS_MASK); return obj_cgroup_memcg(objcg); } =20 - return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); } =20 static inline struct mem_cgroup *page_memcg_check(struct page *page) diff --git a/mm/slab.h b/mm/slab.h index 187acc593397..60417fd262ea 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -448,10 +448,8 @@ static inline struct slabobj_ext *slab_obj_exts(struct= slab *slab) slab_page(slab)); VM_BUG_ON_PAGE(obj_exts & MEMCG_DATA_KMEM, slab_page(slab)); =20 - return (struct slabobj_ext *)(obj_exts & ~MEMCG_DATA_FLAGS_MASK); -#else - return (struct slabobj_ext *)obj_exts; #endif + return (struct slabobj_ext *)(obj_exts & ~OBJEXTS_FLAGS_MASK); } =20 int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s, --=20 2.42.0.758.gaed0368e0e-goog