Date: Thu, 12 Feb 2015 00:41:51 -0800 (PST) From: Christian Kujau <lists@nerdbynature.de> To: freebsd-questions@freebsd.org Subject: FreeBSD 10.1 crashing under load Message-ID: <alpine.DEB.2.19.4.1502120004310.7303@trent.utfs.org>
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Hi, I have a Lenovo Ideapad S10 netbook running FreeBSD 10.1-p5 and ever since I switched from Linux Fedora to FreeBSD the system crashes regularly when the system is under a bit of load :-\ This netbook is operated in a headless mode, so I'm not using Wifi, Bluetooth or other fancy hardware features this netbook might have, only the system's disk and ethernet. I've put a few more details below, but what I wanted to ask is: are there any flags to set in FreeBSD so that it's more chatty when it crashes? Right now the system just reboots but leaves nothing in the system log as to _why_ it crashed. I've configured a crash dump device as per [0] but no crash dump is ever taken. I'm running with encrypted swap (via GELI), maybe crashdumping doesn't work with encrypted swap? I tried to set ddb_enable=YES in rc.conf but the standard kernel doesn't appear to have debugging enabled: # /etc/rc.d/ddb start /etc/rc.d/ddb: WARNING: failed precmd routine for ddb # sysctl debug.ddb.scripting.scripts sysctl: unknown oid 'debug.ddb.scripting.scripts': No such file or directory I don't have a serial console for this machine. Does anybody have any hints to to debug this thing? I haven't touched any boot parameters yet, anybody got a hint which knob to turn there? Thanks, Christian. [0] https://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html $ kldstat Id Refs Address Size Name 1 28 0xc0400000 13a367c kernel 2 1 0xc606c000 12000 geom_eli.ko 3 1 0xc607f000 22000 crypto.ko 4 1 0xc5f7b000 4000 fdescfs.ko 5 1 0xc628a000 8000 linprocfs.ko 6 2 0xc629e000 4a000 linux.ko 7 1 0xc6298000 3000 linsysfs.ko 8 1 0xc61b9000 2000 blank_saver.ko 9 1 0xc68c4000 5000 nullfs.ko The only "exotic" part here is the enabled Linux compatibility: I'm running a (headless) sysutils/linux-crashplan installation on this system but for some reason it's not running with a native FreeBSD JRE but needs java/linux-sun-jre17 to work. When running, this spawns some ~40 java processes that can be quite active on both CPU and network & disk I/O. It uses a lot of memory too and the machine does only have 1GB of physical memory (+1GB swap) but even if the application would use too much memory I'd expect the application to crash, not the whole system. The following is from "top -b" right before the machine crashed: =================================================================== 97 processes: 1 running, 96 sleeping Mem: 57M Active, 630M Inact, 281M Wired, 3104K Cache, 176M Buf, 6808K Free Swap: 1024M Total, 92M Used, 932M Free, 8% Inuse PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 91068 crashplan 1 52 19 1179M 69228K biord 0 0:21 36.18% java 24505 crashplan 1 40 19 1179M 69228K futex 1 11:13 0.78% java 24509 crashplan 1 40 19 1179M 69228K futex 0 0:10 0.49% java 40623 crashplan 1 39 19 1179M 69228K futex 1 179:40 0.00% java 5750 chrisk 1 20 0 15144K 2744K select 0 39:18 0.00% screen 5764 root 1 52 0 11048K 1276K wait 0 35:42 0.00% bash =================================================================== -- BOFH excuse #236: Fanout dropping voltage too much, try cutting some of those little traces
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