Date: Tue, 19 Jun 2018 15:10:44 +1000 From: Trev <freebsd-arm@sentry.org> To: Thomas Skibo via freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: GPT vs MBR for swap devices Message-ID: <47b8ff7c-2fa7-a6fe-ee43-ed4239b478b8@sentry.org> In-Reply-To: <20180619040017.GB81800@www.zefox.net> References: <7AB401DF-7AE4-409B-8263-719FD3D889E5@yahoo.com> <20180618230419.GA81275@www.zefox.net> <A8D00616-ADA7-4A33-8787-637AFEF547CF@yahoo.com> <20180619005519.GB81275@www.zefox.net> <BC42DDF9-9383-437B-8AE2-A538050C5160@yahoo.com> <cce54776-f067-45fc-57df-103883bdc594@sentry.org> <20180619040017.GB81800@www.zefox.net>
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bob prohaska wrote on 19/06/2018 14:00:
> On Tue, Jun 19, 2018 at 12:34:23PM +1000, Trev wrote:
>>
>> Just for reference, with the 32 bit Rpi2, my peak swap usage (with
>> nothing much other than make -j4 buildworld running) is 1.424GB.
>
> That's a surprise, I thought it would be much less. What is your
> swap and storage configuration?
root@rpi2 [/root] $ cat /etc/fstab
# 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/label/swap none swap sw 0 0
/dev/ufs/home /home ufs rw,noatime 2 2
/dev/ufs/usr /usr ufs rw,noatime 2 2
root@rpi2 [/root] $ gpart show
=> 63 30318529 mmcsd0 MBR (14G)
63 102375 1 !12 [active] (50M)
102438 30216154 2 freebsd (14G)
=> 0 30216154 mmcsd0s2 BSD (14G)
0 90 - free - (45K)
90 30216064 1 freebsd-ufs (14G)
=> 40 60567472 da0 GPT (29G)
40 8 - free - (4.0K)
48 4194304 1 freebsd-swap (2.0G)
4194352 54525952 2 freebsd-ufs (26G)
58720304 1847208 - free - (902M)
=> 40 60567472 da1 GPT (29G)
40 60567468 1 freebsd-ufs (29G)
60567508 4 - free - (2.0K)
root@rpi2 [/root] $ mount
/dev/ufs/rootfs on / (ufs, local, noatime, soft-updates)
devfs on /dev (devfs, local)
/dev/msdosfs/MSDOSBOOT on /boot/msdos (msdosfs, local, noatime)
/dev/md1 on /tmp (ufs, local, noatime, soft-updates)
/dev/md2 on /var/log (ufs, local, noatime, soft-updates)
/dev/md3 on /var/tmp (ufs, local, noatime, soft-updates)
/dev/ufs/home on /home (ufs, local, noatime, soft-updates)
/dev/ufs/usr on /usr (ufs, local, noatime, soft-updates)
da0 at umass-sim0 bus 0 scbus0 target 0 lun 0
da0: < USB DISK 2.0 PMAP> Removable Direct Access SPC-4 SCSI device
da0: Serial Number 070B6B2514ABD241
da0: 40.000MB/s transfers
da0: 29574MB (60567552 512 byte sectors)
da0: quirks=0x3<NO_SYNC_CACHE,NO_6_BYTE>
da1 at umass-sim1 bus 1 scbus1 target 0 lun 0
da1: < USB DISK 2.0 PMAP> Removable Direct Access SPC-4 SCSI device
da1: Serial Number 070B6B236F828891
da1: 40.000MB/s transfers
da1: 29574MB (60567552 512 byte sectors)
da1: quirks=0x3<NO_SYNC_CACHE,NO_6_BYTE>
da0 - 32G Emtec USB memory - houses /home and 2G swap partition
da1 - 32G Emtec USB memory - houses /usr
/usr/obj is linked to /home/obj
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