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Date: Tue, 03 Nov 2009 16:53:43 +0000
From: Tom Judge <tom@tomjudge.com>
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To: Weldon S Godfrey 3 <weldon@excelsusphoto.com>
References: <alpine.BSF.2.00.0911020747560.80499@emmett.excelsus.com>	<hcnt4c$12i$1@ger.gmane.org>	<alpine.BSF.2.00.0911021952220.1264@emmett.excelsus.com>	<200911030937.11619.pieter@degoeje.nl>	<alpine.BSF.2.00.0911030832320.36102@emmett.excelsus.com>
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Cc: Pieter de Goeje <pieter@degoeje.nl>, freebsd-current@freebsd.org,
	Ivan Voras <ivoras@freebsd.org>
Subject: Re: FreeBSD 8.0 - network stack crashes?
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Tom Judge wrote:
> Weldon S Godfrey 3 wrote:
>>
>>
>> If memory serves me right, sometime around 9:37am, Pieter de Goeje 
>> told me:
>>
>>> Are you perhaps using em(4)? There was an mbuf leak in the driver, 
>>> which was fixed recently.
>>> You can check mbuf usage with netstat -m.
>>>
>>
>> we are using onboard NICs on the Dell using the bce driver.  We did 
>> try several times to see if using an intel PCIexpress card using the 
>> em driver, and we had the same symptoms.
>>
>> Could the bce driver have the same leak?
> 
> The bce driver does not have a memory leak, it does however have a bug 
> which causes memory fragmentation leading to denied mbuf allocation.
> 
> 
> There is a work around for this in current, you can get the patch like 
> this:
> 
> http://svn.freebsd.org/viewvc/base/head/
> 
That should be:

  svn diff -r 198319:198320 http://svn.freebsd.org/base/head


> You need to put
> 
> options        BCE_JUMBO_HDRSPLIT
> 
> In your kernel to enable the work arround.
> 
> Tom
> 
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