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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3CEA4CD8CA4 for ; Tue, 9 Jun 2026 09:18:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A40636B00B2; Tue, 9 Jun 2026 05:18:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9F0C36B00B4; Tue, 9 Jun 2026 05:18:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 92DD86B00B5; Tue, 9 Jun 2026 05:18:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 817086B00B2 for ; Tue, 9 Jun 2026 05:18:56 -0400 (EDT) Received: from smtpin08.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 24AF5C18EB for ; Tue, 9 Jun 2026 09:18:56 +0000 (UTC) X-FDA: 84859824672.08.A575881 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf03.hostedemail.com (Postfix) with ESMTP id 7484D20003 for ; Tue, 9 Jun 2026 09:18:54 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=mfELCQqu; spf=pass (imf03.hostedemail.com: domain of vbabka@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=vbabka@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1780996734; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=OJajBhmopjl8Hwhv2eDy4ETytAFbNHaX96AYwL3i/hA=; b=esy/MiNZXSoahJnc7XyMP2z1P4MB88KPhmwoi4TIIIrPKvraRbWG3VXp1fCr1AfUmeLBlZ Im8DqQX7IO769QLeXUJJGM6t4j4wrQzAF2PUvna/L2PYqgcyqtyjM2tC1cwJtNCcNGGRB+ fqcOsGRgWSWOak7OEnSx9SfF5pakECI= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1780996734; b=2vnWd1KOCKZr56LeZFoX8fBUgHlmJgpyH33MMIZ4PFf1y1x7pSKUwz977NXqxroIK3riMR TiNDNlFA1pOZHEaGEm0g2TwyExPBh1egT+K+hSKqV+GoLVIWU4ajuUookawVarsa2a6ECd VRwdcAtBNCzddMZIq8Nbn9vfIYLrwLY= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=mfELCQqu; spf=pass (imf03.hostedemail.com: domain of vbabka@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=vbabka@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id B1A14436FB; Tue, 9 Jun 2026 09:18:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E4161F00893; Tue, 9 Jun 2026 09:18:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780996733; bh=OJajBhmopjl8Hwhv2eDy4ETytAFbNHaX96AYwL3i/hA=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=mfELCQqul9/aT0coI5OmrsKZe7PO1SayKTXlVzHfo5FdJBS510xBL5TFtBeFv1y3P Z3GvMh2Hwb1/qdm39TsNjQ5D8N9er45dQ5cYq3QdlIjwMOVZFxjCZZV9LJNaQ1MjDk Rh7md2C8uFOyx5bhIbbF5dmc6QW8SCEe4YAsnnFRBGbWrdsTbe/o7w/nyo+Lypqzuh 2ess4G9bFRWrg2DvUeVJ5GAlWD1ErJZHnoSJkT858OBpogUyzV+ZJ9EOD612txR2H3 fQxsOqVZlNxw3+qjQdeAvxOi2jvHlN6TkOG7rK/Y++TaUsOOJvu5x8Hq+uZqiGRql9 hLtXn+P/tGUWw== From: "Vlastimil Babka (SUSE)" Date: Tue, 09 Jun 2026 11:18:00 +0200 Subject: [PATCH RFC 15/15] mm: remove the __GFP_NO_OBJ_EXT flag MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260609-slab_alloc_flags-v1-15-2bf4a4b9b526@kernel.org> References: <20260609-slab_alloc_flags-v1-0-2bf4a4b9b526@kernel.org> In-Reply-To: <20260609-slab_alloc_flags-v1-0-2bf4a4b9b526@kernel.org> To: Harry Yoo Cc: Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin , Suren Baghdasaryan , Alexei Starovoitov , Andrew Morton , Johannes Weiner , Michal Hocko , Shakeel Butt , Alexander Potapenko , Marco Elver , Dmitry Vyukov , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, "Vlastimil Babka (SUSE)" X-Mailer: b4 0.15.2 X-Rspamd-Queue-Id: 7484D20003 X-Rspam-User: X-Stat-Signature: 8yrby9fqi3xm7sft86yhkuis6xiz5kwh X-Rspamd-Server: rspam08 X-HE-Tag: 1780996734-128610 X-HE-Meta: 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 xG/jX6eD 4gJJq0hPq979BFBIOHESMj5IgYtL7tmWucVpKpT5t9KD+bfHIoo35yp8swt5UFO1U+ajNDIpzrD/1rYqzEYrBjZF2jDdMRoiLVr3bwrz/MhOWCXe2qJWMbis46FziTfgAgwW6ByDGyHLy2TQLEUgYOdvWW+pFHEkWDk7jj28CZ5rHElYs+L9CvuSDOPRuGS2ZgK72/ZdjF67jDRPpTZljnmRKP28T7D4xY2nuMUjfV9x+6PDuWxRhHR+KYksI7u+Ry/Ut8vUj9D2Jv5mvwMLFD+o6UvLzZ45eQ6c9 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: All users of the flag are converted to SLAB_ALLOC_NO_RECURSE. Free up the flag bit. Signed-off-by: Vlastimil Babka (SUSE) --- include/linux/gfp_types.h | 7 ------- include/linux/slab.h | 2 +- include/trace/events/mmflags.h | 10 +--------- lib/alloc_tag.c | 2 +- tools/include/linux/gfp_types.h | 7 ------- 5 files changed, 3 insertions(+), 25 deletions(-) diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h index 6c75df30a281..a93b8bd200b7 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) @@ -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 diff --git a/include/linux/slab.h b/include/linux/slab.h index 11e82fdbe8d3..15d1917b81d3 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -1043,7 +1043,7 @@ void *_kmalloc_nolock_noprof(DECL_TOKEN_PARAMS(size, token), gfp_t gfp_flags, in /** * kmalloc_nolock - Allocate an object of given size from any context. * @size: size to allocate - * @gfp_flags: GFP flags. Only __GFP_ACCOUNT, __GFP_ZERO, __GFP_NO_OBJ_EXT + * @gfp_flags: GFP flags. Only __GFP_ACCOUNT, __GFP_ZERO * allowed. * @node: node number of the target node. * diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h index a6e5a44c9b42..c1a05ff0feab 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/lib/alloc_tag.c b/lib/alloc_tag.c index ed1bdcf1f8ab..63686b44a23d 100644 --- a/lib/alloc_tag.c +++ b/lib/alloc_tag.c @@ -776,7 +776,7 @@ static __init bool need_page_alloc_tagging(void) * If insufficient, a warning will be triggered to alert the user. * * TODO: Replace fixed-size array with dynamic allocation using - * a GFP flag similar to ___GFP_NO_OBJ_EXT to avoid recursion. + * something similar to slab's SLAB_ALLOC_NO_RECURSE to avoid recursion. */ #define EARLY_ALLOC_PFN_MAX 8192 diff --git a/tools/include/linux/gfp_types.h b/tools/include/linux/gfp_types.h index 6c75df30a281..a93b8bd200b7 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