From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 698CD2B5DE for ; Tue, 24 Oct 2023 13:47:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--surenb.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jruETnkR" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-5a8d9dcdd2bso84670657b3.2 for ; Tue, 24 Oct 2023 06:47:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1698155219; x=1698760019; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=re9qyJoQbXM1lB3hu8WMyX+cG50piCMxG0UfNqXuCfM=; b=jruETnkRnSVV0kTi+ktdQvpf5bTl6q1QWfAhPWF+lfkEWviN0tIxw+yF2WCKb/m2pR ou3nDAbBfcW3xYiFUFkBA48nCZqUV3Bh1pUgB6ET+1KAhuVXvI1GvKb2y6iz6rA0wyTC JdT+wZE9JyPThORWwsJ00J4RdMeLOTq97j5rSV4q9s4Gif/3VsKm06IRUoQlqVS1bH/B bkn8W9kGiXfMUvlqbohaeuvn4JxfTiU9XVd+v9VyH/eueTRleExKlCyBee9UJpy+rBsB HFrRoTezmNVP5YouKFem9h5z9wMN+DDbqAyjbrANT56lut4nAkcoY2Bkd1MxLnx84umY sn+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698155219; x=1698760019; 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=re9qyJoQbXM1lB3hu8WMyX+cG50piCMxG0UfNqXuCfM=; b=qFBXWZKkF3Llii6jqDyhCFhd+V0Tl2ouB6f19jWMssiryit5im6Bt/l85+vZG6MbXO az/Lf515kE82gzQiN3xu7JTB2/61YtE1PhSjjWdocSwjEsOLmei9IG43ayvrN0iY8Hw/ EC5xd4iFW6hl7RquxzlvGkaPbNyQyb8Dm4N19AIoGXKWbU+jA/vvScguvH95YbUk6bX2 n2Gw7R32pU+MINLHWE78sig1IZUjWkaMGJqFGj6NDV71ceMLe7dcRSuWwtWVHfIZ1gq9 IG8i5/49oR/Lb32zOMeObaMtzFFSRBs1BWwvca2JcJxX9vLmF/huG3qFMsI2qA4EZkoF B6cA== X-Gm-Message-State: AOJu0YzkG5owpzM31O9A7bQebYqveTbonpg3VrEvZdfhkeS57t1hjQ/N iztz+zSar9OiavuWwfNAHcLX68eFjak= X-Google-Smtp-Source: AGHT+IGJ25fW4BnP1NJYhrzH0X+zrhr1/eHne8PBOna8hmvrezOwpbGVvOl7JHFMC4rGhoY/sRPJncXHlfA= X-Received: from surenb-desktop.mtv.corp.google.com ([2620:15c:211:201:45ba:3318:d7a5:336a]) (user=surenb job=sendgmr) by 2002:a05:6902:1083:b0:d9a:c946:c18c with SMTP id v3-20020a056902108300b00d9ac946c18cmr311395ybu.6.1698155219188; Tue, 24 Oct 2023 06:46:59 -0700 (PDT) Date: Tue, 24 Oct 2023 06:46:05 -0700 In-Reply-To: <20231024134637.3120277-1-surenb@google.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20231024134637.3120277-1-surenb@google.com> X-Mailer: git-send-email 2.42.0.758.gaed0368e0e-goog Message-ID: <20231024134637.3120277-9-surenb@google.com> Subject: [PATCH v2 08/39] mm: introduce __GFP_NO_OBJ_EXT flag to selectively prevent slabobj_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, 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 Content-Type: text/plain; charset="UTF-8" Introduce __GFP_NO_OBJ_EXT flag in order to prevent recursive allocations when allocating slabobj_ext on a slab. Signed-off-by: Suren Baghdasaryan --- include/linux/gfp_types.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h index 3fbe624763d9..1c6573d69347 100644 --- a/include/linux/gfp_types.h +++ b/include/linux/gfp_types.h @@ -52,6 +52,9 @@ enum { #endif #ifdef CONFIG_LOCKDEP ___GFP_NOLOCKDEP_BIT, +#endif +#ifdef CONFIG_SLAB_OBJ_EXT + ___GFP_NO_OBJ_EXT_BIT, #endif ___GFP_LAST_BIT }; @@ -93,6 +96,11 @@ enum { #else #define ___GFP_NOLOCKDEP 0 #endif +#ifdef CONFIG_SLAB_OBJ_EXT +#define ___GFP_NO_OBJ_EXT BIT(___GFP_NO_OBJ_EXT_BIT) +#else +#define ___GFP_NO_OBJ_EXT 0 +#endif /* * Physical address zone modifiers (see linux/mmzone.h - low four bits) @@ -133,12 +141,15 @@ enum { * node with no fallbacks or placement policy enforcements. * * %__GFP_ACCOUNT causes the allocation to be accounted to kmemcg. + * + * %__GFP_NO_OBJ_EXT causes slab allocation to have no object extension. */ #define __GFP_RECLAIMABLE ((__force gfp_t)___GFP_RECLAIMABLE) #define __GFP_WRITE ((__force gfp_t)___GFP_WRITE) #define __GFP_HARDWALL ((__force gfp_t)___GFP_HARDWALL) #define __GFP_THISNODE ((__force gfp_t)___GFP_THISNODE) #define __GFP_ACCOUNT ((__force gfp_t)___GFP_ACCOUNT) +#define __GFP_NO_OBJ_EXT ((__force gfp_t)___GFP_NO_OBJ_EXT) /** * DOC: Watermark modifiers -- 2.42.0.758.gaed0368e0e-goog