From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f176.google.com (mail-yw1-f176.google.com [209.85.128.176]) (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 594CC3914FE for ; Sat, 12 Sep 2026 19:55:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789242954; cv=none; b=jCpR5JI+mYRWXVrcsCjVbL1Ai5epFQblc0ALJJ4Xej2ZV4uTPvVkkzOFCxE250Ovb4y1Yw6OCr3/QUCjWHKciG5FyCLmzm3PnGHgMopnnSazWlpL7N1+pGtdriPPB+9uhjl1cVUMt0oKuo+ZIci9EOswk/iX+VBS55MRUAIF8fc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789242954; c=relaxed/simple; bh=6WBpY++pP4wmpap/0jVFlCXobQj6RCxIU3+Y23QnWmU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Rk+xGoU4sidhECFkfhF1Yufhwxyb7Y9VgUBP2I1zQkOhd/BxTB1lnEahmqpG8QOnKR2WokrnH7c31e830gk8eSnViWWPpMmm4Wh5GpzKznjLcfjcKUoqlofkiZGeR7D9ZGZpJ9YrbAr7V9NZbWIhoDl+PLpVoPqJFj4WYZE4KgQ= 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=irDBkSld; arc=none smtp.client-ip=209.85.128.176 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="irDBkSld" Received: by mail-yw1-f176.google.com with SMTP id 00721157ae682-861a2ae9c51so18145977b3.0 for ; Sat, 12 Sep 2026 12:55:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1789242952; x=1789847752; 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=h/xtiDuXddajfEeaRITCEbehQWNBkWU4am5Icja8HbQ=; b=irDBkSldOQhBaBPKdG0C2n9xu6CzVX6satzk8cfXQfTcQoeHaeD22yVns8ndDrQNgF HqhiyQmUkLM1o8OhZ+5Q24tTjFaaNrHIm8Y3m1J/ZftaCGNsawUPLT6u9utTg6lHXWZh zJ317ZdKk33770NND0DCpHHZa2BxDwOlklUuwabS4RigKYhsmopPqNXnC9qot4Yzy3VT LSdQjX0TKgBABQszclpIjqGxHO1PULzcBmVWMuBvqVWAgiluJMhlvg+4pKiVhWwPiVgx PDN4aitBD/Dq9upJJykI4ta8mrUHrLo4Mw7ZgdlhkfTSSMx0czsijRRBVcv+tSGh0Z+Y K1UQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1789242952; x=1789847752; 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=h/xtiDuXddajfEeaRITCEbehQWNBkWU4am5Icja8HbQ=; b=GGJFJ4PAMYE2WzRNwWqa7X8/44Tqzh7ebLgDx1L30VDNc3vTNX+R4MO5tdtc4BPiqN pOeCzYAAtnRD5lc9vPx8bsPgWpi7NquWt+Ly8tU67f9kAxvUk/cImmwe5DVorRZmTty7 z1J31zCaQRxLfkOROR6kwwIsnPaMXlTAfdXlhoJMTd2OMUqiqjfBw/rDECdzFuDiDSH/ ywv9QLdB5s+T+4oz6sqrncYzIbl2S/VhLbVnbvaOECVhE5JOSrIg9RLAHClA7AGUTMCr rVLgnDmWNkAgIUW88BJc47kp3ATMvJ+i4HtVJHCb43966WwIotviZRp2oSx4VYW7GSxf KjPA== X-Forwarded-Encrypted: i=1; AKwUvBz2etpPhFaIscxtX0g62hUjkWdxZhDzXwJ8qDMYBorHEolDotZ3SlPkVzbhN7Y2PhKRvozIoRR0lwlrAw==@vger.kernel.org X-Gm-Message-State: AFuF++nCX4bZ4CPOwi7jTI3m4QyRd2RZNF+HmMFrCVT28zbVz6n15lhL uprpLxacnwj141Z0syQlUvs0HGeEtBGjIwCM7GQJPAIFCRqJd2PBR+jM X-Gm-Gg: AYBFou3PGnRp8UOENaE5oGQgHaTur2TZlL2xckJgAncFre8jHII+rKhPEDLXs1+qD1i pUJcVGxrqUC+2OOpRn8+YYmxmrcWB7akA5On96w7ytI05rv4AIlHj3o7HduwfjxKE/s0AvCIZ0F clgHAXNEcSvuBknME1OF0pw+DPP75hUNwLupXpzrnSmeirQo2kuYdyOeQeArCh/Gu3nC0YGiIyS 8sxfox8uuixKid/9inzYm6iI1dL/lRMtlgKjVpkwDeF2XB/kpNzOBK5pnBFdZJC1BRx0Ikwe42X fMKaZJMtGu5qqTqsV1J859lskEgV8gle+5Py2bHDfJLLKwPq8CqLpyeKtWEmKGCZDxKHMg0z5+d uYheor5PZBmXgZK4+BXzZRyXoMoPSVaVrQNYVw6sww1Nfe149rc9iIrU+3nnGbvYoevBrVgqm+s K3Q1EhrM0ePTlwd+orol5LW/uCGerZCNtG34v1NptsKSB/3h5QZleBsHs15525sP+grMBCvAjG X-Received: by 2002:a05:690c:dc9:b0:873:17c9:afca with SMTP id 00721157ae682-884af455988mr32505057b3.29.1789242947517; Sat, 12 Sep 2026 12:55:47 -0700 (PDT) Received: from localhost ([2600:1702:7a90:6f9f:8bc4:8aec:108d:7a04]) by smtp.gmail.com with ESMTPSA id 00721157ae682-88487ea6026sm22569527b3.32.2026.09.12.12.55.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 12 Sep 2026 12:55:46 -0700 (PDT) From: Matt Turner Date: Sat, 12 Sep 2026 15:55:43 -0400 Subject: [PATCH 1/3] xz: add arch-specific tuning for alpha Precedence: bulk X-Mailing-List: linux-alpha@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: <20260912-alpha-kernel-compression-v1-1-ce9d55330193@gmail.com> References: <20260912-alpha-kernel-compression-v1-0-ce9d55330193@gmail.com> In-Reply-To: <20260912-alpha-kernel-compression-v1-0-ce9d55330193@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=1237; i=mattst88@gmail.com; h=from:subject:message-id; bh=6WBpY++pP4wmpap/0jVFlCXobQj6RCxIU3+Y23QnWmU=; b=owGbwMvMwCW25rVmCc8sv+mMp9WSGLKWrrP3bfLPW3lE+iqTE+MCvXx+4yTf6EX3GjYt2tX/6 /D5i33/Oz6yMIhxMcwUU2SJW6/IMqttx1Kf09K/YOawMoEMkRZpYAACFga+3MS8UiMdIz1TbUM9 QyBDxygeIqfHoJFZXFyaWqSbVlDkkJdfkliSmZ9XrJdfkJpXkF6gl5aZVpKRkV9UnAo0Qi8vtcT U1dHNyNDAxNLRwszJwtHUxNnZydDJzdHR2dXJyNLcxMDZ0tHE1dKcgYtTAOaae3MY/ils79i75e nlO12C2Zdv35omH5VzkFN8i9JNRuF/dZ5NJzwYGZZ/0hP9xvTiRSXn6VxD05OT22b+if7TsuHwt LzV+10VV/EDAA== 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 --- 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 -- 2.54.0