Synopsis says it all. Some screens of systat(1) work fine, but -vm causes systat to exit complaining about missing disks. How-To-Repeat: Try ``systat -vm'' on a diskless machine.
For bugs matching the following criteria: Status: In Progress Changed: (is less than) 2014-06-01 Reset to default assignee and clear in-progress tags. Mail being skipped
I just tested this on 12.1-RELEASE and systat DOES work okay. pxeboot# df -h Filesystem Size Used Avail Capacity Mounted on 10.0.0.1:/mnt/sys 1.9G 1.0G 817M 55% / devfs 1.0K 1.0K 0B 100% /dev tmpfs 357M 8.0K 357M 0% /tmp tmpfs 32M 144K 32M 0% /var 10.0.0.1:/usr 6.8G 2.3G 4.0G 36% /usr 10.0.0.1:/usr/local 9.7G 6.5G 2.4G 73% /usr/local pxeboot# systat -vm 3 users Load 0.23 0.32 0.18 Aug 29 22:29 Mem usage: 20%Phy 12%Kmem 0k%VM Mem: KB REAL VIRTUAL VN PAGER SWAP PAGER Tot Share Tot Share Free in out in out Act 53256 12080 165316 15004 369472 count All 53612 12436 165864 15552 pages Proc: Interrupts r p d s w Csw Trp Sys Int Sof Flt ioflt 2010 total 23 196 19 798 2009 34 7 cow 2004 attimer0 0 zfod atkbd0 1 0.4%Sys 0.0%Intr 1.2%User 0.0%Nice 98.5%Idle ozfod fdc0 6 | | | | | | | | | | %ozfod ppc0 7 > daefr acpi0 9 dtbuf prcfr uhci0+ 10 Namei Name-cache Dir-cache 15472 desvn totfr 6 cbb0 cbb1+ Calls hits % hits % 961 numvn react ata0 14 9 9 100 67 frevn pdwak ata1 15 5 pdpgs Disks intrn KB/t 64884 wire tps 22540 act MB/s 5376 inact %busy laund
Indeed, I cannot see any error messages on a system booted disklessly on stable/12.
(Please re-open if you are able to confirm an issue on a recent version of FreeBSD. Sorry that this was never investigated.)