From owner-freebsd-questions  Thu Apr 13  6:36:51 2000
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From: Kiril Mitev <kiril@ideaglobal.com>
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Subject: Re: "no memory for rx list"
In-Reply-To: <8237.955632901@axl.ops.uunet.co.za> from Sheldon Hearn at "Apr 13, 2000  3:35: 1 pm"
To: sheldonh@uunet.co.za (Sheldon Hearn)
Date: Thu, 13 Apr 2000 13:42:35 +0000 (GMT)
Cc: kiril@ideaglobal.com, freebsd-questions@FreeBSD.ORG
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Thank you. :-))

> 
> 
> On Thu, 13 Apr 2000 13:07:57 GMT, Kiril Mitev wrote:
> 
> > Dear All .... therein a log dump from one of our 
> > (rather busy) servers:
> 
> I'm glad you mentioned that, since it makes the explanation more
> plausible. :-)
> 
> > Apr 12 23:32:39 excalibur /kernel: xl1: no memory for rx list --
> > packet dropped!
> 
> The manual page for the xl(4) driver says:
> 
>         xl%d: no memory for rx list The driver failed to allocate an
>         mbuf for the receiver ring.
> 
> Using the search engine on the FreeBSD web page to search for "mbuf",
> the first hit I get turns up this:
> 
>         The panic indicates that the system ran out of virtual memory
>         for network buffers (specifically, mbuf clusters). You can
>         increase the amount of VM available 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. The
>         default value for NMBCLUSTERS is 512 + MAXUSERS * 16.
> 
> While you're not getting a panic, the advice is still sound.
> 
> Ciao,
> Sheldon.

-- 
Kiril Mitev,


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