From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yx1-f41.google.com (mail-yx1-f41.google.com [74.125.224.41]) (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 A89E53AF65F for ; Sat, 17 Oct 2026 16:53:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.224.41 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792256028; cv=none; b=X4NU9fCVHPUrue4+F80sqL1pDTfWGFx/5Mlu86VX4+WIjK3dvv6LOFUwHcfJ1zUrol/TMhl7F9RXCJZrH1NWf1BUaSw6ofVT1d5DzpgaC4+/c2DoNTvs/LQGgwPEXWGkzz+Of1+6jyJ2skn/TzMbMykFO2asNaKyFDxTZMN7FqY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792256028; c=relaxed/simple; bh=cysc2j1366OmctghB3AI094WnsKsHd73OjTSGM1Q9bU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=mbv2+BHlpuJoXQ3pXUT8poFj6KKL/CPJuvOi1Lv6RgrGxm+cu1tYxU8bAqO0UUuMdQkZYTWamez0qaXyvO8eJPRFc29+OEgE/28Q/tQfaRp3dVlyOwUWA8TplKjEjx3gsp/jvLfRVVjW7u+HuFJ9hthv0+j8IidOKBX33Ltp0Y8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=sa+haMP9; arc=none smtp.client-ip=74.125.224.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="sa+haMP9" Received: by mail-yx1-f41.google.com with SMTP id 956f58d0204a3-679a2297c55so685556d50.1 for ; Sat, 17 Oct 2026 09:53:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1792256027; x=1792860827; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=lvztSsbPyX4v8cJBqT9illj3oDeQbU6HRi4CIvf5HjI=; b=sa+haMP9B5jVSXyFabZahtI0Xi1YbZMbxdk2sNbtOXxpayO8jPTTzlRngK86vpEwSL ami3P9VtiDSGNYGXpkxmYjLqu9LVXcZcrzVAVu8l/69V1/by7abUjSvLvf2Q2epkFpB1 TsQ2oAH8e3K//KRmRpGdlRqLpRhieKzAm5PzdDdASSiTO5xnKN2Z7Y/Eao5GNo50fNXE 98AuJnhSaQ4hkLlUt1ZW/goBitU6kfJl52waVl9SNxw8XJ47hHiQA11kWwiIPN51iQrF o+sGuZ2fqiNxthbFrx0j693o88RXXexkhIq028/tmxH9HlcOEsvKiz1ktFWN5KahswcE l7yA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792256027; x=1792860827; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=lvztSsbPyX4v8cJBqT9illj3oDeQbU6HRi4CIvf5HjI=; b=pbKvCfOdFRzNuE4emwS7MXAevYlsnAQK59MHqphGoyS73xoRHbwa6EusGCfjxJw5Gs TbBMJwq4eyy9KHH1eLQelZTLOiG4c+UalBeRsH2YGAGTZOiAA27V0a1CME0/kDPvRcIF n7Orqay07XkBzpoaduhVHGV0/HkGjQWz9hV7/6hh1C4GSFOPuou6fEJK5OkS8DuIygbK pen/fF1Wa0/WeoouBI7Uo1qVE9eEVa0RPZ7T48HgFReJbohrBMdo5aCAGRLxvnF3Mxfj wO6tF8r+bHJEZVvw/f89lDZhsYgRImmzSJCNONmO+87wiImJZCYCHpZlcXFOXysuA03F YBnA== X-Gm-Message-State: AFq9FYIkZ0HOcfKVfGQx/wdY7K+YtxvwnngwpmDO+H6VG+kmLwbsqbLd nMakEqIaQzPG4JSCxmLUQaU214wY6q7VoWqOF8ONFKqQsoPdzVZI9Y94 X-Gm-Gg: AYBFou3/iOtLvKewyvARhqmkW9yRqLljx+68fyIaGlLTi7mBCUzQ2BA3Uq0w78EcyV8 YkzlCwmEdX2tTz9f5amq+1zhaFN+0ddCsQM34xRwvKCJc21QsxI6KMyhk6GL8jnIB9lAQ6mTHfI 5PpjT3VsvSjzaREJqOehlh4fcYA98Md8UtM10XkIpD1LdM64SFPZ5FrqlmQngCg22nwum7c38NI u8p6y4pAbi3gvjXcwu19Xn1LYWAclKwTtAg26tXu/XzyRZ+TQejDd6bprugLt01JXToNhTlJ31A VEKuu1LfcUunECO5qxmzgoHn5uzbQvQkkOW1aZ7/3AYEfA9Kr73kVY6vqYIP3h5qEtmgvc8t4wE pdxjDA97umG3dBP89e/PNrUISsR/ty66i8kf0klBXRg5GY2y8Ck+6BpqwNB89ZHf/BjfSVfRiOY yFL+I0TP4v0IImEIX63RCSEFIHP7hjWfXcuyzN5OgYqnCoiNiit5YWAI+Z/ThDiewmWhSemIr6C hkAEvamjeBZEZ3TSfbIKuh8X2w7UkkL9zuquyQyk9TzQTxhlsCpncrGV+WovHLD+qGV04MfKQ4W 72Po/5peSTveSOBw+81bdl5SZoNI X-Received: by 2002:a53:ac81:0:b0:679:8c43:a140 with SMTP id 956f58d0204a3-679ca733107mr925088d50.31.1792256026733; Sat, 17 Oct 2026 09:53:46 -0700 (PDT) Received: from localhost (108-93-236-139.lightspeed.chtnsc.sbcglobal.net. [108.93.236.139]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-679b1e4083esm2398412d50.9.2026.10.17.09.53.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Oct 2026 09:53:45 -0700 (PDT) From: Matt Turner Date: Sat, 17 Oct 2026 12:53:33 -0400 Subject: [PATCH v2 1/3] xz: add arch-specific tuning for alpha Precedence: bulk X-Mailing-List: linux-kernel@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: <20261017-alpha-kernel-compression-v2-1-c71e6b08dc63@gmail.com> References: <20261017-alpha-kernel-compression-v2-0-c71e6b08dc63@gmail.com> In-Reply-To: <20261017-alpha-kernel-compression-v2-0-c71e6b08dc63@gmail.com> To: Lasse Collin , Richard Henderson , Magnus Lindholm , Nick Terrell , David Sterba Cc: linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, Matt Turner X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1389; i=mattst88@gmail.com; h=from:subject:message-id; bh=cysc2j1366OmctghB3AI094WnsKsHd73OjTSGM1Q9bU=; b=owGbwMvMwCW25rVmCc8sv+mMp9WSGLIur+A1vVwjcmtr+d9bh8t/rvnx+LWd+aNXvfsv3Zd8p dN44YuEa8dHFgYxLoaZYooscesVWWa17Vjqc1r6F8wcViaQIdIiDQxAwMLAl5uYV2qkY6Rnqm2o Zwhk6BjFQ+T0GDQyi4tLU4t00wqKHPLySxJLMvPzivXyC1LzCtIL9NIy00oyMvKLilOBRujlpZa Yujq6GRkamFg6Wpg5WTiamjg7Oxk6uTk6Ors6GVmamxg4WzqauFqaM3BxCsBcs+0pI8O8897vvh ls3/5UOu4Bw5mNPZecTmrfdNWvinpnzb5o5Zkghv8pd2oCq21Of/tb6h6zd8unnhWiVy/E3W/nD RMUvmHCP4EbAA== X-Developer-Key: i=mattst88@gmail.com; a=openpgp; fpr=3BB639E56F861FA2E86505690FDD682D974CA72A Alpha has fixed-length, 4-byte-aligned instructions and no XZ BCJ filter, so it wants the same LZMA2 settings as the other 4-byte-aligned targets. Without an entry it hits the default case, which warns scripts/xz_wrap.sh: Arch-specific tuning is missing for 'alpha' and conservatively assumes 2-byte alignment. Alpha gains HAVE_KERNEL_XZ later in this series; the correct alignment also shrinks a UP1500 kernel's XZ image from 6469320 to 6448840 bytes. Signed-off-by: Matt Turner Reviewed-by: Magnus Lindholm Tested-by: Magnus Lindholm Reviewed-by: Lasse Collin --- scripts/xz_wrap.sh | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/scripts/xz_wrap.sh b/scripts/xz_wrap.sh index f19369687030..5af0d9045cbc 100755 --- a/scripts/xz_wrap.sh +++ b/scripts/xz_wrap.sh @@ -10,6 +10,7 @@ # XZ-compressed kernel isn't currently supported on every listed arch. # # Arch Align Notes +# alpha 4 # arm 2/4 ARM and ARM-Thumb2 # arm64 4 # csky 2 @@ -44,6 +45,10 @@ BCJ= # Set the BCJ filter if one is available. # It must match the #ifdef usage in lib/decompress_unxz.c. case $SRCARCH in + alpha) + ALIGN=4 + ;; + arm) if is_enabled CONFIG_THUMB2_KERNEL; then ALIGN=2 -- 2.55.0