Date: 23 Jan 2002 15:58:52 +0100 From: Lars Erik Gullerud <lerik@kq.no> To: qa@freebsd.org Subject: 4.5-RC2 kernel, m_clalloc failed Message-ID: <1011797933.75400.19.camel@elmer.i.eunet.no>
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I moved one of our shoutcast streaming servers over to 4.5-RC2 during the weekend to test it in a high network load environment. It was installed "fresh" on a clean system with an FTP install, i.e. not an upgrade from the old 4.4 install. After being in operation for just a few hours the server started logging these messages continously: Jan 23 14:34:41 disrv01 /kernel: m_clalloc failed, consider increase NMBCLUSTERS value Jan 23 14:34:41 disrv01 /kernel: fxp0: cluster allocation failed, packet dropped! Jan 23 14:34:42 disrv01 last message repeated 850 times The server had to be rebooted in order to function properly again, network connectivity was basically gone until it was rebooted. After reboot it again functioned for a few hours and then the same thing happened. The server is running 5 instances of the shoutcast server (original sc_serv binary from shoutcast, not icecast) on 5 separate TCP ports. The load had been steady between 400 and 500 concurrent TCP streams @ 128kbit for the whole 24 hours, and was at apx. 450 streams served when this error hit. Nothing else is running on this server. Kernel was recompiled for this machine after install, so not a GENERIC kernel, maxusers was set to 0 to test the auto-allocation. The NMBCLUSTERS as reported in kern.ipc.nmbclusters=8640. This is a P3-800 512MB RAM box, who has been running steadily at a lot higher loads than this for a long time on 4.4-STABLE (750 streams max), so I'm assuming it's an issue introduced in 4.5. Unless it's just my stupidity and something just needs to be configured differently - maybe I should avoid the maxusers=0 and set some table sizes manually or something? I don't know what kind of info you might require, I'm not really much of a "kernelhacker", but I hope you fix whatever the prob is before 4.5-RELEASE or I'll have to stay on 4.4 for our streaming boxes. Regards, Lars Erik Gullerud To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-qa" in the body of the message
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