Date: Thu, 5 Sep 2019 14:05:20 -0700 From: John Kennedy <warlock@phouka.net> To: Ricky Zhang <zhangchaowang@gmail.com> Cc: freebsd-arm@freebsd.org Subject: Re: How to change rootfs from official RPI3 image Message-ID: <20190905210520.GA43216@phouka1.phouka.net> In-Reply-To: <A8C596BB-AC79-4CD2-B70B-E1B3CD36743D@gmail.com> References: <0FC8815E-58D7-4196-BF7E-0D6B127B314D@gmail.com> <1668312327.7.1566381369480@localhost> <C5D66D8B-05F2-445A-92A5-CD463B393EEA@gmail.com> <61580006.14.1566389702495@localhost> <D815D0C1-E17A-412F-AEF0-772E7B1DE857@gmail.com> <op.z662cwh9kndu52@sjakie> <A8C596BB-AC79-4CD2-B70B-E1B3CD36743D@gmail.com>
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On Wed, Aug 28, 2019 at 05:55:41AM -0400, Ricky Zhang wrote: > PS: TBH, there are so many hardware limitations on RPI 3B+. > > - The 1GB memory is too small for ZFS or running jail. I can???t even clone FreeBSD port form Git repo due to OOM. > - The Ethernet is built on USB 2.0. The network speed is slow. > - USB 2.0 is slow when do disk I/O. > > In addition, ARM64 is still 2nd tier support from FreeBSD. The port security update may be out of date. > > Based on my observations, RPI 3B+ is not suitable for my experiment purpose where I want to deploy a word press jail. I may keep it to do some security experiments, instead. For what it is worth and to establish my stubborn/crazy credentials, I've got my RPI3B+ running on ZFS and currently using poudriere jail to build my flavor of ports. It's grinding on llvm80 for the 2nd time (took more than 24 hours the first time so got killed by the stock timeout), working towards X11 with firefox (although I'll have to go to 12-stable to get around the rust problem). Along with ZFS, one of the first things I did was give myself ~8G of swap as a native partition. Anything more than straight paging-to-disk seemed to cause too many problems during a memory crunch, which as you noticed is quite easy to do. Using FreeBSD-sourced packages, I could certainly pull down the kernel source and compile it (~31 hours), as well as the ports source via git. You may need to tweak some git settings (via .gitconfig; threads, memory size). I know you'll need to tweak them to git garbage collect on those repos. It is slow with the USB disk. Memory is an issue. Swap space is an issue, and if you're not careful your /tmp (via tmpfs) will get you too. 4GB on a RPI4 with USB3-speed disks (or better?) would be a nice boost, once that port gets working. 4GB RPI4s seem to be scarce.
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