Re: problems with e1000 and jumboframes

From: Arnd Hannemann
Date: Thu Aug 03 2006 - 11:30:46 EST

Benjamin LaHaise schrieb:
> On Thu, Aug 03, 2006 at 03:48:39PM +0200, Arnd Hannemann wrote:
>> However the box is a VIA Epia MII12000 with 1 GB of Ram and 1 GB of swap
>> enabled, so there should be plenty of memory available. HIGHMEM support
>> is off. The e1000 nic seems to be an 82540EM, which to my knowledge
>> should support jumboframes.
>> However I can't always reproduce this on a freshly booted system, so
>> someone else may be the culprit and leaking pages?
>> Any ideas how to debug this?
> This is memory fragmentation, and all you can do is work around it until
> the e1000 driver is changed to split jumbo frames up on rx. Here are a
> few ideas that should improve things for you:
> - switch to a 2GB/2GB split to recover the memory lost to highmem
> (see Processor Type and Features / Memory split)
> - increase /proc/sys/vm/min_free_kbytes -- more free memory will
> improve the odds that enough unfragmented memory is available for
> incoming network packets
> I hope this helps.

:-) Yes it did. I increased /proc/sys/vm/min_free_kbytes to 65000 and
now it works. Thank you!

> -ben

Best regards,
Arnd Hannemann

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