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 7AF2427EC7C for ; Thu, 28 May 2026 07:07:13 +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=1779952034; cv=none; b=NiCO8Vie3GMQZDKgFmpg225qtzpoTlaHAD7WrpcRDEFMCxu7MxRQRB/PP+1ugWZwOsNcLIqRgyXGuUpZ+X62iqMQhBdVq9LFFOPCnpfjkF3aYBQdQmcwIYU9a78mJ72+x/rSM2dYpaW6D7VQBq+rkbFIvw3XtDV5+H7I/nYw2gs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779952034; c=relaxed/simple; bh=lPXZX81r8D6y0LcklNSle04O4ePN9SkN+yM/9oX70R4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MyDj89QrxRb73Oo8Lcu3AL/UJ52RbUwmueR0/acSuxlKgc1mypbX45/72JCr8Mcm7IqEDX/mi9onf5B0NkL4CXH+O0P8aKHx9C333c1TFUaWV02Wyey0K0uei+wECVDJLA04HZtdw9lwHo8YVSZOjAPzJuomzzVqajKa5tWZce4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=f2Y46CSh; 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="f2Y46CSh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40E561F000E9; Thu, 28 May 2026 07:07:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779952033; bh=lPXZX81r8D6y0LcklNSle04O4ePN9SkN+yM/9oX70R4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=f2Y46CSh3F23bGXpevUSaEb+PJCz4DCdo84L1BKZjEifVvkdJ9Cc+DR4oKwLNxcG3 pKteKv/5/7ZpFrVLkDtT4n981/95Sa13KFNmAwrtjtG1tx50SFU5D3YxMwAkQamSbG Qq83Mpi1RQbrOy73YnYtAjwGCpqD5w4muSd8/nbATYODHie4qnlUoTbij3OhOUTOOm Mlcif0e7zdzd0xVvu6GWxpbwdi+640rPsfK9A8XBUoKiWtcq9bRP8T59NLXZAGPkil xqipezKdnDcqQ+bIDS8Fbwu4AyxShf5eQ6hPRYUfEFPcisG0yIN4rvq29mWEsCXqdi a1bd02OxjTvWQ== From: Tomas Glozar To: linux-kernel@vger.kernel.org, x86@kernel.org Cc: Sebastian Andrzej Siewior , "H . Peter Anvin" , Borislav Petkov , Dave Hansen , Ingo Molnar , Jonathan Corbet , Thomas Gleixner Subject: Re: [PATCH] x86: Start removing X86_X32_ABI Date: Thu, 28 May 2026 09:05:48 +0200 Message-ID: <20260528070548.2967334-1-tglozar@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260523093734.A3AR7reJ@linutronix.de> References: <20260523093734.A3AR7reJ@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit FWIW, T2 Linux [1] also has an option to build x32, and there have been such builds last year [2]. Since this year, it switched to building KDE Plasma desktop ISOs, where x32 makes less sense, though, as modern desktop is rather RAM-hungry. [1] https://t2linux.com [2] https://dl.t2sde.org/binary/2025/t2-25.10-x32-base-wayland-glibc-gcc-nocona.iso Also at least 6 years ago, x32 was reported there to increase performance by some 5-8% [3] likely thanks to smaller pointers allowing better cache utilization. That is not insignificant, and not all tasks require gigabytes of RAM (e.g. compression and encryption, as shown in the link). [3] https://www.youtube.com/live/Mw-ravkg67k?si=HS7ZHZyg_FKXPZUz&t=387 (yeah YouTube video not the best source...) Tomas