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b=UxCT6vACMdQPgyHvNr5RdFbgoGcaztcVBBhwz0trhDbYVEyoOhoZaYftJ6FJx7FyNV vYKP1HVMBSE8lhzVDGDLEzyWHRJIq3eOfdlsWBcBtHrWz28XKnhu6oQ6eqkXoXExVY35 esfPFbFoGN/Gwi8o5OIW/bw7Hmr0V2sVJ7AetEEHyv+IwK/LW7lB3URLBa/QzQljvX1A 1lzYeh5TdwgSL2V10vFx8YY8LibBuhsPs+hugMSw5H7vpVioGaZQu9mmIPcA+ex6wEPF OPRecaXFSvhu9zmDSv7tl3dtxxANIrL5eUi7hRJfSAO9x3l3caomHHvYzawtRrex8Fo0 YUJw== X-Forwarded-Encrypted: i=1; AHgh+Rrp1Hawbz51HaQc7RezHhJxTqE4BoMSR9dJGKHKidc6rnEHMiYCj6fOgbbNPntpJiRmH5igj3ABmA==@kvack.org X-Gm-Message-State: AOJu0Yz09iPbVAb1DEESXuV0ZM1foF6qWQrFmfOXfUiP49JjQpJIooZE pMFs0l9+P8OG+d8w8B9XSVY3+eF2ywguowgC+s52zuIAl2oFVhvIwPh5sUuocdPRobRALuZQnVu 3qKvuPL5HEA== X-Received: from dldyq11-n2.prod.google.com ([2002:a05:701b:454b:20b0:13b:a1b5:d4c1]) (user=jyescas job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:2d42:b0:3bf:a0e5:99a5 with SMTP id adf61e73a8af0-3c44b191b26mr2284095637.47.1784793011546; Thu, 23 Jul 2026 00:50:11 -0700 (PDT) Date: Thu, 23 Jul 2026 00:47:11 -0700 In-Reply-To: <20260723074854.1013941-1-jyescas@google.com> Mime-Version: 1.0 References: <20260723074854.1013941-1-jyescas@google.com> X-Mailer: git-send-email 2.55.0.229.g6434b31f56-goog Message-ID: <20260723074854.1013941-8-jyescas@google.com> Subject: [RFC PATCH 07/16] mm: Define function to create a dir for each migrate type From: Juan Yescas To: Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , open list , "open list:MEMORY MANAGEMENT - CORE" Cc: jyescas@google.com, android-mm@google.com, fvdl@google.com, tkjos@google.com, minchan@google.com, dskiba@google.com, open list , "open list:MEMORY MANAGEMENT - CORE" Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: D7A66C0005 X-Stat-Signature: e93i18efio7mq97aqz1gk43aznem8fp3 X-HE-Tag: 1784793012-97493 X-HE-Meta: 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 5aME1ZQd 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: This change creates a directory for each migrate type inside the order directory. This function won't create a directory for MIGRATE_ISOLATE due they can't be allocated using the Buddy Allocator. Note: The MIGRATE_CMA directory won't be created yet. It will be supported in the future. Signed-off-by: Juan Yescas --- mm/page_alloc_hogger.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/mm/page_alloc_hogger.c b/mm/page_alloc_hogger.c index de86b8526338..a727c4f48ffb 100644 --- a/mm/page_alloc_hogger.c +++ b/mm/page_alloc_hogger.c @@ -127,6 +127,37 @@ struct page_alloc { struct kmem_cache *req_alloc_cache; struct kmem_cache *page_alloc_cache; +/** + * create_migrate_type_subdirs() - Creates a directory for each migrate type + * inside the order directory. Once the migrate type directory is created, it + * creates the "nr_allocs" file and the "free" file. + */ +static inline int create_migrate_type_subdirs(struct dentry *orderdir, + int node_idx, int zone_idx, + int order) +{ + struct dentry *migratedir; + char dirname[24]; + + for (int mtype = 0; mtype < MIGRATE_TYPES; mtype++) { +#ifdef CONFIG_CMA + if (mtype == MIGRATE_CMA) /* CMA allocs are not supported yet*/ + continue; +#endif +#ifdef CONFIG_MEMORY_ISOLATION + if (mtype == MIGRATE_ISOLATE) /* can't allocate from here */ + continue; +#endif + snprintf(dirname, sizeof(dirname), "migrate-%s", + migratetype_names[mtype]); + migratedir = debugfs_create_dir(dirname, orderdir); + if (IS_ERR(migratedir)) + return PTR_ERR(migratedir); + } + + return 0; +} + /** * create_page_orders_subdirs() - Creates a directory for each page order inside * the zone directory. Once that the page order directory is created, it creates @@ -138,12 +169,18 @@ static inline int create_page_orders_subdirs(struct dentry *zonedir, { struct dentry *orderdir; char dirname[12]; + int ret; for (int order = 0; order < NR_PAGE_ORDERS; order++) { snprintf(dirname, sizeof(dirname), "order-%d", order); orderdir = debugfs_create_dir(dirname, zonedir); if (IS_ERR(orderdir)) return PTR_ERR(orderdir); + + ret = create_migrate_type_subdirs(orderdir, node_idx, zone_idx, + order); + if (ret) + return ret; } return 0; -- 2.55.0.229.g6434b31f56-goog