From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3BD8943DA56; Wed, 15 Jul 2026 10:11:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784110280; cv=none; b=m3d5eqWJQ0b8pcd4lsRuoRnUymt2k+yNBYmJRVU4WFe6dK7+D9VFHoVn75KngIEMIAAnxE4FM3ENOTPUy9a8hGn56Yw1p1YMOppYV636pp2rY7NAraViWbqOM6v0VYbfY4AVGGfdYVWkBYKOftuCEOdIfozSINIHOrql+6AXdCM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784110280; c=relaxed/simple; bh=Mxf3aQzzm1ZlIgi0DL+4j9W5p2xB6gAnyg59IfYqc3Y=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=reXHuoslmRmc6yIBE1pmHcV0WxEHJzxw3PWy6FlkSXye0B1BYUH4QAO1PC5FqzINRcj3kJ0U7D2hsotI6G5/yA+8fPjCl2k4mJEJKAA8jQKawoslByVxTAjc5V3x3yGW9g9IZH1DUVMdGK/Opqkl9ZwfA1vVqxYi/BHUvdyYyCo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jdrxhmen; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jdrxhmen" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40E2D1F00A3A; Wed, 15 Jul 2026 10:11:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784110278; bh=B2kW+nJ77Mj5M53RnXhGqydD3hqQWm7pjmVwGgIrn1U=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=jdrxhmenWOsGlFcFe34zNIcdL7yScchP+BGEXwVOT4VENtyhZdFST8n9qyp6/L4Yp SWFYyCccxOp3weHr3MOPD+5gneEjf5ugtTQL+LgQOryTgr1mAnLlydiRjoqmwR4TYu +Bpzf045bXGHBWADEZiVvUV2JsqNsXcQlm0/YrEgD6O34cGoIO6UrbfWpQRH0giKWs CF3htpkQHU4rW8ss6v/x9sreGGx95uCcmruWcL01MlduUv/6CNnJRhuHkrKnSIVCa4 462mibkP9u12I9xjfmgn+Zf4E0JAtqA23X+lHwr3La55OrIyWgykAuBm0rq7nq2Hwl 5jFoqHW+fSK5w== From: "Vlastimil Babka (SUSE)" Date: Wed, 15 Jul 2026 12:10:50 +0200 Subject: [PATCH RFC 10/12] mm/slab: reduce slabobj_ext memory with allocation profiling disabled Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260715-b4-objext_split-v1-10-9a49c4ccf4c3@kernel.org> References: <20260715-b4-objext_split-v1-0-9a49c4ccf4c3@kernel.org> In-Reply-To: <20260715-b4-objext_split-v1-0-9a49c4ccf4c3@kernel.org> To: Harry Yoo , Suren Baghdasaryan Cc: Hao Li , Shakeel Butt , Alexander Potapenko , Marco Elver , Andrew Morton , Christoph Lameter , David Rientjes , Roman Gushchin , linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, "Vlastimil Babka (SUSE)" X-Mailer: b4 0.15.2 When memory allocation profiling is compiled in but permanently disabled on boot with (implicit or explicit) "never" parameter, stop allocating (wasting) memory for the codetag_ref parts of slabobj_ext metadata. Signed-off-by: Vlastimil Babka (SUSE) --- mm/slab.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/slab.h b/mm/slab.h index dcca86799fc9..a50347c9dbe3 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -587,7 +587,7 @@ static inline size_t static_obj_ext_size(void) if (IS_ENABLED(CONFIG_MEMCG)) sz += 1; - if (IS_ENABLED(CONFIG_MEM_ALLOC_PROFILING)) + if (slab_obj_ext_has_codetag()) sz += 1; return sizeof(struct slabobj_ext) * sz; -- 2.55.0