Date: Tue, 22 Dec 2009 16:48:48 +0100 From: Florian Smeets <flo@smeets.im> To: Pete French <petefrench@ticketswitch.com> Cc: freebsd-stable@FreeBSD.org Subject: Re: Disc lock up on 8.0-STABLE Message-ID: <4B30EA60.9060500@smeets.im> In-Reply-To: <E1NN5aB-0004Vt-AW@dilbert.ticketswitch.com> References: <E1NN5aB-0004Vt-AW@dilbert.ticketswitch.com>
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On 12/22/09 3:19 PM, Pete French wrote: >> As the box is remote with only ssh access, it's a little difficult to >> debug this. During the weekend i waited till 3 o'clock with a top >> running, and saw that hundreds/thousands of /bin/sh processes were >> started. After that i commented out periodic daily in /etc/crontab, that >> "solved" the problem for me. > > Interesting - I have tried running the daily periodic processes by hand, but > that does not trigger it. Possibly it is something about being run from > cron maybe ? Same here! > >> I was not able to debug this any further yet, i have one other box with >> all UFS and a ZFS backup disc also running latest 8-STABLE but it does >> not exhibit the problem. > > Same here :-( My other box is identical hardware and almost config (UFS > and ZFS) but it works fine. > > I am not sure that ym debug kernel will help now - assuming this is the > same thing as you are seeing, it sounds like a process running amok rather > than any kernel bug. Was yoour system a fresh install, or an upgrade from > 7-STABLE ? I'm not 100% sure anymore, but i think i installed 7.2-RELEASE set hw.pci.mcfg=0 in loader.conf due to 8.0-BETAX not detecting the discs without it and then immediately upgrading to 8-STABLE. But the box has been running 8-STABLE since around end of August, and the first time it happened was about 10-14 days ago, after i upgraded world+kernel. When the problem occurs and you happen to have a shell everything you try to run is being rejected with an error no resources for fork or something. I had to enter reboot like 30 times before the box rebooted. So with a bit of patience one will be able to get aditional information out of the box. Cheers, Florian
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