Date: Sun, 8 Jul 2018 09:32:32 +1000 From: Trev <freebsd-arm@sentry.org> To: freebsd-arm@freebsd.org Subject: Re: RPI3 swap experiments Message-ID: <d19ed4de-b9af-9856-c732-ebdc40e20fc9@sentry.org> In-Reply-To: <2deaaec3-f78f-0b09-5ca7-27e14c6979f9@sentry.org> References: <20180627194217.GA27793@www.zefox.net> <C6303FC5-B412-472C-98E4-9A1E45C38535@yahoo.com> <20180628022457.GA30110@www.zefox.net> <7B9D272D-3EDE-46FA-8A1C-AEE65047167C@yahoo.com> <20180628163328.GA33408@www.zefox.net> <51e208b4-9f14-58f7-1e70-6ef8db2c0bed@sentry.org> <20180629155131.GA35717@www.zefox.net> <c6b8842a-fcc5-8e11-5a03-ba76eb3c5dea@sentry.org> <20180629233937.GC35717@www.zefox.net> <0f137e06-214a-3e8c-a216-f061ec04ac2c@sentry.org> <20180630005145.GA43801@www.zefox.net> <6f3406e2-71f3-d0c2-2b65-703e1a1d3c25@sentry.org> <8e92b2b7-da61-3efb-7231-9fac76b2c1d4@sentry.org> <ba33d8a7-a849-3893-8016-0765ebe1c51f@sentry.org> <2deaaec3-f78f-0b09-5ca7-27e14c6979f9@sentry.org>
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Trev wrote on 04/07/2018 07:09: > Conclusion: The only way to buildworld on the RPi3B+ is to use an > external USB mechanical hard disk (my hybrid Seagate 500G 2.5" drive > required a powered USB hub). No issues on a RPi2B v1.1 with swap and > /usr on a USB memory key. One last experiment occurred to me: I placed a SanDisk 8GB Ultra micro SDCard in a microSD card reader (this one: https://www.amazon.co.uk/MICRO-SD-MICRO-SDHC-MEMORY-READER/dp/B002WKD0CQ ), created a 2G swap partition and ran make -j4 buildworld SUCCESSFULLY! Twice. uname -aKUp FreeBSD rpi3.sentry.org 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r335854: Mon Jul 2 16:03:04 AEST 2018 root@rpi3.sentry.org:/usr/obj/usr/src/arm64.aarch64/sys/RPI3-12.0 arm64 aarch64 1200069 1200069 gpart show -l da0 => 40 15523760 da0 GPT (7.4G) 40 4194304 1 usdswap (2.0G) 4194344 11329456 - free - (5.4G) # Custom /etc/fstab for FreeBSD embedded images /dev/ufs/rootfs / ufs rw,noatime 1 1 /dev/msdosfs/MSDOSBOOT /boot/msdos msdosfs rw,noatime 0 0 md1 /tmp mfs rw,noatime,-s100m 0 0 md2 /var/log mfs rw,noatime,-s15m 0 0 md3 /var/tmp mfs rw,noatime,-s15m 0 0 /dev/da0p1 none swap sw 0 0 da0 at umass-sim0 bus 0 scbus0 target 0 lun 0 da0: <SD/MMC Card Reader 1.00> Removable Direct Access SCSI device da0: Serial Number 058F63356432 da0: 40.000MB/s transfers da0: 7580MB (15523840 512 byte sectors) da0: quirks=0x2<NO_6_BYTE> The only unusual, but apparently harmless, log messages were: Jul 7 15:39:01 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 143089, size: 327 68 Jul 7 17:46:35 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 14712, size: 8192 Jul 7 17:47:21 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 17239, size: 2457 6 Jul 7 17:47:21 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 20737, size: 8192 Jul 7 17:47:21 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 511807, size: 409 6 Jul 7 18:50:34 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 988, size: 4096 Jul 7 18:50:34 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 318727, size: 655 36 Jul 7 18:55:02 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 354041, size: 286 72 Jul 7 21:45:10 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 164496, size: 491 52 Jul 7 23:04:38 rpi3 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 372151, size: 655 36
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