From owner-freebsd-stable Sun Sep 19 18:50: 4 1999 Delivered-To: freebsd-stable@freebsd.org Received: from postman.bahianet.com.br (postman.bahianet.com.br [200.223.88.38]) by hub.freebsd.org (Postfix) with ESMTP id DC1F7159FB; Sun, 19 Sep 1999 18:49:38 -0700 (PDT) (envelope-from jcarlos@bahianet.com.br) Received: from jcarlos (jcarlos.bahianet.com.br [200.223.88.250]) by postman.bahianet.com.br (8.9.3/8.9.3) with SMTP id WAA12813; Sun, 19 Sep 1999 22:49:50 -0300 (EST) Message-ID: <000501bf030a$ac70e7a0$fa58dfc8@bahianet.com.br> From: "Joao Carlos" To: , , Cc: Subject: Out of mbuf clusters Date: Sun, 19 Sep 1999 22:51:35 -0300 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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-stable" in the body of the message