linux-kernel - Re: problems with e1000 and jumboframes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-id: <44D21720.6080202@arndnet.de>
Date:	Thu, 03 Aug 2006 17:32:48 +0200
From:	Arnd Hannemann <arnd@...dnet.de>
To:	Benjamin LaHaise <bcrl@...ck.org>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: problems with e1000 and jumboframes

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



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/