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[96.255.20.138]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4eda57ad8e6sm3293421cf.27.2025.11.07.14.50.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Nov 2025 14:50:05 -0800 (PST) From: Gregory Price To: linux-mm@kvack.org Cc: linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org, nvdimm@lists.linux.dev, linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, dave@stgolabs.net, jonathan.cameron@huawei.com, dave.jiang@intel.com, alison.schofield@intel.com, vishal.l.verma@intel.com, ira.weiny@intel.com, dan.j.williams@intel.com, longman@redhat.com, akpm@linux-foundation.org, david@redhat.com, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, osalvador@suse.de, ziy@nvidia.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, gourry@gourry.net, ying.huang@linux.alibaba.com, apopple@nvidia.com, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, tj@kernel.org, hannes@cmpxchg.org, mkoutny@suse.com, kees@kernel.org, muchun.song@linux.dev, roman.gushchin@linux.dev, shakeel.butt@linux.dev, rientjes@google.com, jackmanb@google.com, cl@gentwo.org, harry.yoo@oracle.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, zhengqi.arch@bytedance.com, yosry.ahmed@linux.dev, nphamcs@gmail.com, chengming.zhou@linux.dev, fabio.m.de.francesco@linux.intel.com, rrichter@amd.com, ming.li@zohomail.com, usamaarif642@gmail.com, brauner@kernel.org, oleg@redhat.com, namcao@linutronix.de, escape@linux.alibaba.com, dongjoo.seo1@samsung.com Subject: [RFC PATCH 1/9] gfp: Add GFP_PROTECTED for protected-node allocations Date: Fri, 7 Nov 2025 17:49:46 -0500 Message-ID: <20251107224956.477056-2-gourry@gourry.net> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251107224956.477056-1-gourry@gourry.net> References: <20251107224956.477056-1-gourry@gourry.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" GFP_PROTECTED changes the nodemask checks when ALLOC_CPUSET is set in the page allocator to check the full set of nodes in cpuset->mems_allowed rather than just sysram nodes in task->mems_default. Signed-off-by: Gregory Price --- include/linux/gfp_types.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h index 65db9349f905..2c0c250ade3a 100644 --- a/include/linux/gfp_types.h +++ b/include/linux/gfp_types.h @@ -58,6 +58,7 @@ enum { #ifdef CONFIG_SLAB_OBJ_EXT ___GFP_NO_OBJ_EXT_BIT, #endif + ___GFP_PROTECTED_BIT, ___GFP_LAST_BIT }; =20 @@ -103,6 +104,7 @@ enum { #else #define ___GFP_NO_OBJ_EXT 0 #endif +#define ___GFP_PROTECTED BIT(___GFP_PROTECTED_BIT) =20 /* * Physical address zone modifiers (see linux/mmzone.h - low four bits) @@ -115,6 +117,7 @@ enum { #define __GFP_HIGHMEM ((__force gfp_t)___GFP_HIGHMEM) #define __GFP_DMA32 ((__force gfp_t)___GFP_DMA32) #define __GFP_MOVABLE ((__force gfp_t)___GFP_MOVABLE) /* ZONE_MOVABLE all= owed */ +#define __GFP_PROTECTED ((__force gfp_t)___GFP_PROTECTED) /* Protected nod= es allowed */ #define GFP_ZONEMASK (__GFP_DMA|__GFP_HIGHMEM|__GFP_DMA32|__GFP_MOVABLE) =20 /** --=20 2.51.1