From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FROM autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 6820 invoked from network); 26 Apr 2021 17:52:24 -0000 Received: from 1ess.inri.net (216.126.196.35) by inbox.vuxu.org with ESMTPUTF8; 26 Apr 2021 17:52:24 -0000 Received: from mail-pf1-f175.google.com ([209.85.210.175]) by 1ess; Mon Apr 26 13:22:49 -0400 2021 Received: by mail-pf1-f175.google.com with SMTP id d124so39395486pfa.13 for <9front@9front.org>; Mon, 26 Apr 2021 10:22:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=i34tjQjWtSNmtpBRvHpvg7eXgnj19HXTW7Eal8lRvGM=; b=do+z9MV2apSFHMF57V+JpYvx73OuNmti0q1JV+FJvaCRPgB0eYDpXO7Glih5xcpcXZ LLeSXU+HaYwZObLv3OGS1IPPEiuM8/V4KyHwbdHfwYZQaR0WtC5i+Guqxg8Dq4pnKgWH ZBJqMULRgkGVTq7aMtHL0WEy6kn+BmZS0/zRm7QECTnE7IJiThI37XP/MqQQG/ibpjpV cEQBPL6mKxyDja4rjQzImZSs1gpZo7Mq2W3UzEYwDUK6zfGQC6HP6nxCiBpHpZ6CESVs ePnsTBGbeu/dqSpdK1RjHfWjojbsAFibaOhh+g66DMKUWhwqD8AtmQRce/PzNeEIIQsf 3DGg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=i34tjQjWtSNmtpBRvHpvg7eXgnj19HXTW7Eal8lRvGM=; b=OjRm1NX3dbtznP3K4g5y5a/3kjl6o027toH7hUGb8xKOkVQGpZr5SylsoT7jcVA9z2 qGXCBjhsYEJzNpb5UMKlxySwl51HTR07/Uj33QefSmZWHyCNSivkOz1KQhfmtlQZ2oFl LUgqcMTHxvvYYbZlfHqY7vu1j/KHOk7LSvpHm8tLJrsljqGisI1xb+/vD9iBuRQ/h0H/ gxd5YaWuQYkP8gLnbb1t8pDyvo4K6VEC3eR5r4Z/rINmxEwV1AdaT+qhVponBksAGSmo J7RWg7quPn3tbfiZZa8H7KkqmebfDh4X3JR3Uj7z+d7Y93KUUnajr9MIQtWpxKJAR9Cb Bo/Q== X-Gm-Message-State: AOAM533Ucvjwai+r2QdcbOCMejq2FsCn1rRCbHAOigaxwUXgVQyUQFMe n//IlShp+n4V/PRYqCaUUMV4zQYHmT2hh9g1MPf4hmb6 X-Google-Smtp-Source: ABdhPJyJF6R44sfp+5yfJ42+oJwdvtjuwxMSIhVGzJZ+hi0fH4Fe9PfupWp/n3v9U4hZaWrGB50y/x0dkRZZNsKOehA= X-Received: by 2002:a05:6a00:be2:b029:258:834c:cdc9 with SMTP id x34-20020a056a000be2b0290258834ccdc9mr18688301pfu.54.1619457427986; Mon, 26 Apr 2021 10:17:07 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a05:6a20:a01e:b029:1b:3549:26b7 with HTTP; Mon, 26 Apr 2021 10:17:07 -0700 (PDT) In-Reply-To: <7A5D7DAF-4C1D-42FF-9570-9B8F7F685A8D@me.com> References: <7A5D7DAF-4C1D-42FF-9570-9B8F7F685A8D@me.com> From: hiro <23hiro@gmail.com> Date: Mon, 26 Apr 2021 19:17:07 +0200 Message-ID: To: 9front@9front.org Content-Type: text/plain; charset="UTF-8" List-ID: <9front.9front.org> List-Help: X-Glyph: ➈ X-Bullshit: hosting database-scale high-performance software realtime-java-oriented cloud-scale interface Subject: Re: [9front] Getting Started with Kernel Development? Reply-To: 9front@9front.org Precedence: bulk rpi is not very good at network booting. but you can use 9front to network reboot. in other words, you can keep an outdated kernel on the sd card, as a 9front bootloader. that's one of the many great things you can build with /dev/reboot ! On 4/26/21, Daniel Morandini wrote: > Hi, >> Ideally, I'd be able >> to go back and forth between a known good kernel and whatever I'm >> hacking at. I don't want to be backing up my SD card and restoring it >> over and over again, if at all possible. > Network boot [2]! Starting from rpi 2B v1.2, if you change the OTP > field that allows USB boot mode [1], your SD slot becomes just a > useful SD card reader. Otherwise you need the `bootcode.bin` file > to be in the sd at boot time, but that does not have to change. > > Cheers, > dan > > [1] > https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/net.md > [2] http://fqa.9front.org/fqa6.html#6.7