Swapping from a zvol results in a deadman panic

2017-02-04 Thread Matthew X. Economou
My FreeBSD 10.3-RELEASE-p16 server crashes in the middle of a Poudriere bulk run (see below). This crash happens even if I lower vfs.zfs.arc_max or tweak vm.v_free_min/target/reserved/severe. I'm looking for configuration advice in case I missed something obvious, since this seems to work on

FreeBSD and IPMI how-to (was Re: su problem)

2012-06-14 Thread Matthew X. Economou
Daniel Braniss writes: just for the record, serial on 8.x works fine! the device naming has changed from sio to uart, and maybe some features. We use it on all our servers, even redirecting it where possible via ILO,IMPI,DRAC. and is great for debuging or saving long trips :-) Would some

RE: FreeBSD root on a geli-encrypted ZFS pool

2012-03-10 Thread Matthew X. Economou
Fabian Keil writes: In my opinion protecting ZFS's default checksums (which cover non-metadata as well) with GEOM_ELI is sufficient. I don't see what advantage additionally enabling GEOM_ELI's integrity verification offers. I follow you now. You may be right about the extra integrity

RE: reboot after panic

2008-05-01 Thread Matthew X. Economou
Steve, I recall having to set dumpdev in /etc/rc.conf before I could get FreeBSD to reboot automatically after a panic. I have dumpdev=AUTO set on all of my headless servers. If you are feeling especially brave, you can also set fsck_y_enable=YES and background_fsck=NO. Good luck! ;) -- I

RE: PXE booting issues

2007-06-25 Thread Matthew X. Economou
Morgan, I had much better luck using PXELINUX to chain-load FreeBSD. I wrote up an article on the subject (http://web.irtnog.org/doc/how-to/freebsd-install-pxe-wds), but the corresponding blog entry might make for a shorter read

Creating one's own installer/mfsroot

2007-05-08 Thread Matthew X. Economou
Could anyone recommend a good guide for developing one's own mfsroot images suitable for recovery or scripted installation (not using sysinstall)? It appears that one could develop a simplified network-based installation process based around fdisk, disklabel, newfs, mount_ufs, fetch, and pax,

Alternate installers for FreeBSD for unattended installation

2007-04-26 Thread Matthew X. Economou
I'm having a difficult time developing a scripted install using sysinstall, as my target hardware is not sufficiently uniform, hostnames vary, etc. The sysinstall documentation implies that alternatives are available, and that sysinstall is not really supported any more. Where can I find these

RE: tcpdump, rl, sis, fxp and multicast problems

2007-01-20 Thread Matthew X. Economou
not very important but wouldn't it be better to set the checksum to 0 instead of some arbitrary (?) and confusing value then ? No, as not setting the checksum is a (minor) optimization. Setting that field to any arbitrary constant means at least one completely unnecessary CPU instruction per

RE: gmirror disks vs partitions

2007-01-17 Thread Matthew X. Economou
Apart from potentially avoiding a whole disk from being copied during a resync after a crash, are there any other advantages to using partition level mirroring instead of drive level mirroring? Joe, Partition-level software RAID plus LVM is how the following Slashdot poster manages extendable