From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f74.google.com (mail-wm1-f74.google.com [209.85.128.74]) (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 BDCA23D34AB for ; Fri, 3 Jul 2026 12:32:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783081964; cv=none; b=prBAdUfnSq/+VbMBsj9bUqjWqB1gLdbNcuKnGXVQjmU6TqE7mD6qq8VtYWogpydDI5/mH/TcFlbJTy9LW/lYwOn0gu5bik7zZvBwnEXEbYilB1DBRn1Bj3vhfYa2q5/9XLYYn1n66lqpDklRgp8N86TYB60p9kHwqXVXFcyn8YU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783081964; c=relaxed/simple; bh=gjlIxPgMeedEPJ9k/uIWaq0fO9Ob53kXRuNpoa9e5KE=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=SCYBrnsQfIxeyFAsSPYdaI5KyWqAh4RFG86K3LZ1gwNz6VrvfI0POJnnnxuP+hFHECswx9yYPYxePoZOVVyAnNWRfaXXeN1sUcf8tZPZ3+H0kDX0TELXWXWIyOOpqaVK4qMjYhOkUWc9FDnBvJHeI9UNMfdiz94IibnrgF8vlRk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jackmanb.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=jc+iOMfK; arc=none smtp.client-ip=209.85.128.74 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--jackmanb.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jc+iOMfK" Received: by mail-wm1-f74.google.com with SMTP id 5b1f17b1804b1-493bd52dae6so3708775e9.0 for ; Fri, 03 Jul 2026 05:32:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1783081960; x=1783686760; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=6S3JNEhTHh8S5PWRfrbe8AKMasrMsda1UyR5Zu08tMA=; b=jc+iOMfKMXeirbn5nYjfXLd4jO49FOL2J6wOmjSJYEQ+CEadkh6Y7+5ni35lzGKvI8 12W0QmWTxH8P5SxF5R+YI+xTY419sSf6Nh+Ecf+/PkEC5eCdZJhTF2FQW1Ff53sUkvMM wn7ZeXBnn1CQ19+xFyvx1zJuGEdo8cT0xltCLeu+TlS6NBB3oZgvyxXx45K+J+WplyIc l4tpEQli3ve2ZNLI9foZHSPLRklIHApgHJiQZeCpodhVVgi4G1ZzcRfq6gPpSA7u8HCI Atc4wQ7DYdr/RHK4YoY3qaJGBOqNlG8gGTG54S9KfE6lWrrr/AFtv/mKx+RLzF2Vcr5E 1qsA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783081960; x=1783686760; 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=6S3JNEhTHh8S5PWRfrbe8AKMasrMsda1UyR5Zu08tMA=; b=VpxLEPnfoJUZkBKtNJpgG25m+lAUkrKs5nEG3TqUgW1leV4zGUJ74hq+G99qJwEhgk 1XwKMTFo2tD/BNklELdWchftd4L8X5NIdIcEcMLAdngM0bUFUsXJFKXYiwGOWf2k7eDu aYc9bAjSPT7vDT0TLy0WHgIOCV7QHgnOV3r2M0fNBKjPhjNIVVZPijFTSCu5X/PyCKTj q+LJZbEAmQ5KHPvCL+RjGp4BpLXiY7ByI4qy5JNrr2PLFkoMqO30Fp31rKyR/3Pd9aL8 vr4/Av4BbprNnHE6RGJ7Y6BH00Y97cVt/pg1iuCVGDSTMikCs0y4aEbjErsgPy+wljz5 laPQ== X-Forwarded-Encrypted: i=1; AFNElJ9qC3yUCG+5n95uy7gf+CzzPVesjOUaBCVMkj8K1Ae+W8WiCBpJs+TJ3Znai7jvltmEtkaoxq4FhnC4SOg=@vger.kernel.org X-Gm-Message-State: AOJu0YwejNIhPX5VVGGQ0nLTOJArMCi4v9kV/cs6wu5HSS/qWbxZgPxG ZsbtT9/JFn/S832SYJHH6goWiAN4XJbi5EXN//bfgdiZ5yHSU1rOh9obP+T5YmH1N3gqPMzAjlG X+WxMP15amozysg== X-Received: from wmg3.prod.google.com ([2002:a05:600c:22c3:b0:492:4659:9cd8]) (user=jackmanb job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:34d4:b0:493:b8cf:cc8a with SMTP id 5b1f17b1804b1-493c2b3ccd2mr128779195e9.4.1783081959528; Fri, 03 Jul 2026 05:32:39 -0700 (PDT) Date: Fri, 03 Jul 2026 12:31:56 +0000 In-Reply-To: <20260703-alloc-trylock-v5-0-c87b714e19d3@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260703-alloc-trylock-v5-0-c87b714e19d3@google.com> X-Mailer: b4 0.15.2 Message-ID: <20260703-alloc-trylock-v5-16-c87b714e19d3@google.com> Subject: [PATCH v5 16/18] mm: remove the __GFP_NO_OBJ_EXT flag From: Brendan Jackman To: Andrew Morton , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Johannes Weiner , Zi Yan , Muchun Song , Oscar Salvador , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Mike Rapoport , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Ying Huang , Alistair Popple , Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt Cc: "Harry Yoo (Oracle)" , Gregory Price , Johannes Weiner , Alexei Starovoitov , Matthew Wilcox , Hao Ge , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, derkling@google.com, reijiw@google.com, Brendan Jackman , Yosry Ahmed Content-Type: text/plain; charset="utf-8" From: "Vlastimil Babka (SUSE)" All users of the flag are converted to SLAB_ALLOC_NO_RECURSE or ALLOC_NO_CODETAG (from __GFP_NO_CODETAG which reused the NO_OBJ_EXT bit). Free up the flag bit. Signed-off-by: Vlastimil Babka (SUSE) [Rebased onto __GFP_NO_CODETAG removal] Signed-off-by: Brendan Jackman --- include/linux/gfp_types.h | 7 ------- include/trace/events/mmflags.h | 10 +--------- tools/include/linux/gfp_types.h | 7 ------- 3 files changed, 1 insertion(+), 23 deletions(-) diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h index 463b551d12d99..190191411009f 100644 --- a/include/linux/gfp_types.h +++ b/include/linux/gfp_types.h @@ -55,7 +55,6 @@ enum { #ifdef CONFIG_LOCKDEP ___GFP_NOLOCKDEP_BIT, #endif - ___GFP_NO_OBJ_EXT_BIT, ___GFP_LAST_BIT }; @@ -96,7 +95,6 @@ enum { #else #define ___GFP_NOLOCKDEP 0 #endif -#define ___GFP_NO_OBJ_EXT BIT(___GFP_NO_OBJ_EXT_BIT) /* * Physical address zone modifiers (see linux/mmzone.h - low four bits) @@ -138,17 +136,12 @@ enum { * * %__GFP_ACCOUNT causes the allocation to be accounted to the active * cgroup context. - * - * %__GFP_NO_OBJ_EXT causes slab allocation to have no object extension. - * mark_obj_codetag_empty() should be called upon freeing for objects allocated - * with this flag to indicate that their NULL tags are expected and normal. */ #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 diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h index a6e5a44c9b429..c1a05ff0feab0 100644 --- a/include/trace/events/mmflags.h +++ b/include/trace/events/mmflags.h @@ -54,18 +54,10 @@ # define TRACE_GFP_FLAGS_LOCKDEP #endif -#ifdef CONFIG_SLAB_OBJ_EXT -# define TRACE_GFP_FLAGS_SLAB \ - TRACE_GFP_EM(NO_OBJ_EXT) -#else -# define TRACE_GFP_FLAGS_SLAB -#endif - #define TRACE_GFP_FLAGS \ TRACE_GFP_FLAGS_GENERAL \ TRACE_GFP_FLAGS_KASAN \ - TRACE_GFP_FLAGS_LOCKDEP \ - TRACE_GFP_FLAGS_SLAB + TRACE_GFP_FLAGS_LOCKDEP #undef TRACE_GFP_EM #define TRACE_GFP_EM(a) TRACE_DEFINE_ENUM(___GFP_##a##_BIT); diff --git a/tools/include/linux/gfp_types.h b/tools/include/linux/gfp_types.h index 6c75df30a281d..a93b8bd200b76 100644 --- a/tools/include/linux/gfp_types.h +++ b/tools/include/linux/gfp_types.h @@ -55,7 +55,6 @@ enum { #ifdef CONFIG_LOCKDEP ___GFP_NOLOCKDEP_BIT, #endif - ___GFP_NO_OBJ_EXT_BIT, ___GFP_LAST_BIT }; @@ -96,7 +95,6 @@ enum { #else #define ___GFP_NOLOCKDEP 0 #endif -#define ___GFP_NO_OBJ_EXT BIT(___GFP_NO_OBJ_EXT_BIT) /* * Physical address zone modifiers (see linux/mmzone.h - low four bits) @@ -137,17 +135,12 @@ 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. - * mark_obj_codetag_empty() should be called upon freeing for objects allocated - * with this flag to indicate that their NULL tags are expected and normal. */ #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 -- 2.54.0