Date: Thu, 18 Jan 1996 04:54:54 -0800 From: David Greenman <davidg@Root.COM> To: davide@galactica.it Cc: hackers@FreeBSD.org Subject: Re: panic !! Message-ID: <199601181254.EAA06699@Root.COM> In-Reply-To: Your message of "18 Jan 1996 12:00:32 GMT." <199601181100.DAA25186@freefall.freebsd.org>
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>Sometimes my FreeBSD 2.0 reboots saying: >Panic: kmem_map (or mb_map) too small ! > >I know that this problem is caused by a vm problem, >My system has 48mb Ram ... I think that's' enought... >Can anyone help me to avoi this problem ? >Can I increase the size of these maps ? The panic indicates that the system ran out of virtual memory for network buffers (specifically, mbuf clusters). You can increase the amount of VM avaliable for mbuf clusters by adding: options "NMBCLUSTERS=<n>" ...to your kernel config file, where <n> is a number in the range 512-4096, depending on the number of concurrent TCP connections you need to support. I'd recommend trying 2048 - this should get rid of the panic completely. You can monitor the number of mbuf clusters allocated/in use on the system with netstat -m. -DG David Greenman Core Team/Principal Architect, The FreeBSD Project
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