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2024 09:35:01 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1] recipes-initramfs/compress-initrd: add recipe to compress initrd with xz To: srinuvasan.a@siemens.com, isar-users@googlegroups.com Cc: felix.moessbauer@siemens.com, adriaan.schmidt@siemens.com References: <0372409e74c5d0aab55e61d8c2f9f2e988b0297d.camel@siemens.com> <20240513094143.365942-1-srinuvasan.a@siemens.com> From: Jan Kiszka Content-Language: en-US In-Reply-To: <20240513094143.365942-1-srinuvasan.a@siemens.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: FR2P281CA0008.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:a::18) To AS4PR10MB6181.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:20b:588::19) Return-Path: jan.kiszka@siemens.com MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS4PR10MB6181:EE_|PA2PR10MB9079:EE_ X-MS-Office365-Filtering-Correlation-Id: 00af130a-f807-4504-1b19-08dc81443067 X-MS-Exchange-SenderADCheck: 1 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=?utf-8?B?T0hRMThuUStVeURaK0loQkt2NGovakpCK25jVmxaVnJaSFd1cjVxT1VGWGtQ?= =?utf-8?B?SkYwNUd6WWdXRkRVZjIvRktxeXVuZXFvM3N2ZDVwTXhTVGIxZVJNK2Fnb2dy?= =?utf-8?B?Tm9rY2VOSmlZQnJHZHp1ck9Dd3gzbGp3eEYwdVJCWFQwNmVzQmtOeVE5REVu?= =?utf-8?B?UHpmSlBHMStCU3RDZHUrTFVnK1lyT0Y4Y2wyVlFIdGV3SnpneVRDcTZpSXdP?= =?utf-8?B?d3dkdndBQi9mNk54YUl2WnF2NWlzL29JQXdpN1ZSQklpTWhKUmQ2TTYwOEJu?= =?utf-8?B?REQ4QURQYTdOczhjeG92RStqNnZETTVHOWhLalBUNks5UUJNeVFRdHdqejYx?= =?utf-8?B?WEE9PQ==?= X-OriginatorOrg: siemens.com X-MS-Exchange-CrossTenant-Network-Message-Id: 00af130a-f807-4504-1b19-08dc81443067 X-MS-Exchange-CrossTenant-AuthSource: AS4PR10MB6181.EURPRD10.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 May 2024 07:35:05.0632 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 38ae3bcd-9579-4fd4-adda-b42e1495d55a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: +U5V9lGyMEjXjT3c4R+hB8lPo+DBotcGKIi4UtrSXHnI7doOZrobs96ot0wTMO1BNIIx89Bcav2szaARJsckMA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA2PR10MB9079 X-TUID: srwOVzTfKKyv On 13.05.24 11:41, srinuvasan.a@siemens.com wrote: > From: srinuvasan > > By default initrd compressed with gzip tool, with the present bullseye base image > of amd64 the initrd size is almost 27MB, this can be reduced with the help of xz tool, > using this one the generated initrd size is almost 18MB, we saved almost 9MB. > > Signed-off-by: srinuvasan > --- > meta-isar/conf/local.conf.sample | 2 +- > .../compress-initrd/compress-initrd.bb | 21 +++++++++++++++++++ > .../compress-initrd/files/postinst | 5 +++++ > 3 files changed, 27 insertions(+), 1 deletion(-) > create mode 100644 meta-isar/recipes-initramfs/compress-initrd/compress-initrd.bb > create mode 100644 meta-isar/recipes-initramfs/compress-initrd/files/postinst > > diff --git a/meta-isar/conf/local.conf.sample b/meta-isar/conf/local.conf.sample > index 17455015..ac8b749e 100644 > --- a/meta-isar/conf/local.conf.sample > +++ b/meta-isar/conf/local.conf.sample > @@ -149,7 +149,7 @@ CONF_VERSION = "1" > > # > # The default list of extra packages to be installed. > -IMAGE_INSTALL = "hello-isar example-raw example-module-${KERNEL_NAME} enable-fsck isar-exclude-docs samefile hello isar-disable-apt-cache cowsay example-prebuilt" > +IMAGE_INSTALL = "hello-isar example-raw example-module-${KERNEL_NAME} enable-fsck isar-exclude-docs samefile hello isar-disable-apt-cache cowsay example-prebuilt compress-initrd" > > # > # Machines with secure boot should use signed modules. > diff --git a/meta-isar/recipes-initramfs/compress-initrd/compress-initrd.bb b/meta-isar/recipes-initramfs/compress-initrd/compress-initrd.bb > new file mode 100644 > index 00000000..b1a5909b > --- /dev/null > +++ b/meta-isar/recipes-initramfs/compress-initrd/compress-initrd.bb > @@ -0,0 +1,21 @@ > +# Sample recipe to configure the desired compression tool > +# during initramfs generation > +# > +# This software is a part of ISAR. > + > +DESCRIPTION = "Compress the initrd with configured compression tool" > +MAINTAINER = "Your name here " > + > +inherit dpkg-raw > + > +COMPRESS_TOOL ?= "xz" > + > +DEBIAN_DEPENDS = "linux-image-${KERNEL_NAME}, xz-utils, initramfs-tools" > + > +SRC_URI = " \ > + file://postinst \ > +" > +do_install() { > + install -v -d "${D}/etc/initramfs-tools/conf.d/" > + echo "COMPRESS=${COMPRESS_TOOL}" > "${D}/etc/initramfs-tools/conf.d/${PN}.conf" > +} > diff --git a/meta-isar/recipes-initramfs/compress-initrd/files/postinst b/meta-isar/recipes-initramfs/compress-initrd/files/postinst > new file mode 100644 > index 00000000..0db52142 > --- /dev/null > +++ b/meta-isar/recipes-initramfs/compress-initrd/files/postinst > @@ -0,0 +1,5 @@ > +#!/bin/sh > + > +set -e > + > +update-initramfs -c -k all "However, I'm wondering if we can implement this using the imagetypes infrastructure (@Adriaan, in CC). That would make it consistent across ISAR and also avoid the introduction of additional variables." This question of Felix remains open. Jan -- Siemens AG, Technology Linux Expert Center