Date: Sun, 19 Sep 1999 22:51:35 -0300 From: "Joao Carlos" <jcarlos@bahianet.com.br> To: <stable@freebsd.org>, <questions@freebsd.org>, <security@freebsd.org> Cc: <hitech@bahianet.com.br> Subject: Out of mbuf clusters Message-ID: <000501bf030a$ac70e7a0$fa58dfc8@bahianet.com.br>
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I'm running FreeBSD 3.3-STABLE, and compiled a kernel with 64 maxusers. It gives me somethink like 1048 processes. I don't know if it's a bug, or whatever, but i got crazy when i tested a program called CLONE on a IRC Server running i this machine. Before arriving 1024 connections on te IRCD, (NOTE: nothing more like httpd, squid, etc were running), The machine crashed, with the following message: Sep 19 22:30:04 unix2 /kernel: Out of mbuf clusters - adjust NMBCLUSTERS or increase maxusers! well, i recompiled the kernel with 512 maxusers (more than that config gives warning... why?). I was waiting that at least more tha 1024 connections it would support, but with a little more than 980 (couldn't get the exact number) the machine crashed with the same message. Well, with 512 maxusers i have more than 8000 processes... so.. why this? why does config warning abou kernels with more than 512 maxusers? I know that IRCD can have a bug that does not support more than 1024 connections, but i think the FreeBSD boxes does not have to crash. The machine goes down booting without umounting, and then i have to check forced my disks. Can anyone tell me why is it happening? I'm afraid this can get something exploitable for iRC Server machines!!!! Thanks Joao Carlos jcarlos@bahianet.com.br To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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