From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35DE9C77B7C for ; Mon, 1 May 2023 16:57:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232908AbjEAQ51 (ORCPT ); Mon, 1 May 2023 12:57:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232613AbjEAQ42 (ORCPT ); Mon, 1 May 2023 12:56:28 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC60610D1 for ; Mon, 1 May 2023 09:55:31 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id 3f1490d57ef6-b9a8023ccf1so5355606276.2 for ; Mon, 01 May 2023 09:55:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1682960131; x=1685552131; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=gDL+lQo0P3G6fblFMKJonaRbqsrkB9ljveMgEFO8c80=; b=MVmPTJvnt/d4OHnObDpLo5Yx/m0JxigNMHefGJUQ6YHCHiKWwXI+TPB1lVnlbOYOEt 5jgACI5oKYMCB7Pq7cz3X81+bpZcuEUKDUynk+/ZyYCZwjUk5TCfCarGFU4MMvcurlND oln4td3qiCopzaVDD/Q4rMLFlXyQJx4wDKAU0Wzgmky/qZcwJ14zhRRSwMOBlU9Kez/h x9gFamkwY5h9zdy2v/nUepQsOsBIbNt92VQg8iIvlxGC803m7Adm/vEjtGzf8sBaILXc DjUHk8NLlqyBasCJKVPDW64fh5SwGVhMkreauSlsOSNHTVu6NR6T/SSX4RnGRR6l1W62 EEqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682960131; x=1685552131; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=gDL+lQo0P3G6fblFMKJonaRbqsrkB9ljveMgEFO8c80=; b=hxc4EKEzWMS5hRxesSP1B8taPn6uFUI2K24bq1uYcvblhbNnPqmw41oAiiPX9+d5wH AjFf7ckoe7E3CLxHsTkf/n2cp/D9Do8W9I454d903zFT5jWnuyDmTr8aKsK7hRgLEMT0 GA5uNNGQQmW10t14P26/17+R9gO1NrQrQ1+TnMcd3ehH2CC2GffY8gjen4Av4DyIhUsq vMMU93X3W3NXFmzqD8dATTA5z5QGFfPhyoegHwHNxhr2R5CtInU2u5JWDwtEt+Pvzl0W IEPi/8WyuwpWMCNuUZIH9p6u+7NG+49fg5YGdVBcelj/d+8mRTvd6XG7SLdb3EVM3BKS gw3A== X-Gm-Message-State: AC+VfDyyvkZcm/u+C9F7ZhXUfzFNB2zZRDFU7vnywzRKY8s0wzNBJP8D rwVo1yCMVZzXvfrSVdTlyKlmQ11/ypg= X-Google-Smtp-Source: ACHHUZ6enP7kBREmhiQ0i0LYDuH3RuGEJuyGpBzYXGRy3FeK34ct4OWkfjl1R+bRIQUodsczhvp1FyVsBhk= X-Received: from surenb-desktop.mtv.corp.google.com ([2620:15c:211:201:6d24:3efd:facc:7ac4]) (user=surenb job=sendgmr) by 2002:a25:6b05:0:b0:b8b:f5fb:5986 with SMTP id g5-20020a256b05000000b00b8bf5fb5986mr8475612ybc.10.1682960131180; Mon, 01 May 2023 09:55:31 -0700 (PDT) Date: Mon, 1 May 2023 09:54:20 -0700 In-Reply-To: <20230501165450.15352-1-surenb@google.com> Mime-Version: 1.0 References: <20230501165450.15352-1-surenb@google.com> X-Mailer: git-send-email 2.40.1.495.gc816e09b53d-goog Message-ID: <20230501165450.15352-11-surenb@google.com> Subject: [PATCH 10/40] mm/slab: introduce SLAB_NO_OBJ_EXT to avoid obj_ext creation 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, 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 Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org Slab extension objects can't be allocated before slab infrastructure is initialized. Some caches, like kmem_cache and kmem_cache_node, are created before slab infrastructure is initialized. Objects from these caches can't have extension objects. Introduce SLAB_NO_OBJ_EXT slab flag to mark these caches and avoid creating extensions for objects allocated from these slabs. Signed-off-by: Suren Baghdasaryan --- include/linux/slab.h | 7 +++++++ mm/slab.c | 2 +- mm/slub.c | 5 +++-- 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/include/linux/slab.h b/include/linux/slab.h index 6b3e155b70bf..99a146f3cedf 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -147,6 +147,13 @@ #endif #define SLAB_TEMPORARY SLAB_RECLAIM_ACCOUNT /* Objects are short-lived */ +#ifdef CONFIG_SLAB_OBJ_EXT +/* Slab created using create_boot_cache */ +#define SLAB_NO_OBJ_EXT ((slab_flags_t __force)0x20000000U) +#else +#define SLAB_NO_OBJ_EXT 0 +#endif + /* * ZERO_SIZE_PTR will be returned for zero sized kmalloc requests. * diff --git a/mm/slab.c b/mm/slab.c index bb57f7fdbae1..ccc76f7455e9 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -1232,7 +1232,7 @@ void __init kmem_cache_init(void) create_boot_cache(kmem_cache, "kmem_cache", offsetof(struct kmem_cache, node) + nr_node_ids * sizeof(struct kmem_cache_node *), - SLAB_HWCACHE_ALIGN, 0, 0); + SLAB_HWCACHE_ALIGN | SLAB_NO_OBJ_EXT, 0, 0); list_add(&kmem_cache->list, &slab_caches); slab_state = PARTIAL; diff --git a/mm/slub.c b/mm/slub.c index c87628cd8a9a..507b71372ee4 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -5020,7 +5020,8 @@ void __init kmem_cache_init(void) node_set(node, slab_nodes); create_boot_cache(kmem_cache_node, "kmem_cache_node", - sizeof(struct kmem_cache_node), SLAB_HWCACHE_ALIGN, 0, 0); + sizeof(struct kmem_cache_node), + SLAB_HWCACHE_ALIGN | SLAB_NO_OBJ_EXT, 0, 0); hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI); @@ -5030,7 +5031,7 @@ void __init kmem_cache_init(void) create_boot_cache(kmem_cache, "kmem_cache", offsetof(struct kmem_cache, node) + nr_node_ids * sizeof(struct kmem_cache_node *), - SLAB_HWCACHE_ALIGN, 0, 0); + SLAB_HWCACHE_ALIGN | SLAB_NO_OBJ_EXT, 0, 0); kmem_cache = bootstrap(&boot_kmem_cache); kmem_cache_node = bootstrap(&boot_kmem_cache_node); -- 2.40.1.495.gc816e09b53d-goog