From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ganesh Venkatesan Subject: Re: workaround large MTU and N-order allocation failures Date: Mon, 19 Sep 2005 10:25:29 -0700 Message-ID: <5fc59ff305091910252447d363@mail.gmail.com> References: <20050918143526.GA24181@localdomain> <20050918230822.GA5440@electric-eye.fr.zoreil.com> <20050919071358.GA7107@localdomain> Reply-To: ganesh.venkatesan@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Cc: Francois Romieu , Linux Kernel List , netdev@vger.kernel.org, Nick Piggin Return-path: To: Dan Aloni In-Reply-To: <20050919071358.GA7107@localdomain> Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 82546GB supports an incoming Rx packet to be received in multiple rx buffers. A driver that enables this feature is under test currently. What version of the e1000 are you using? ganesh. On 9/19/05, Dan Aloni wrote: > On Mon, Sep 19, 2005 at 01:08:22AM +0200, Francois Romieu wrote: > > Dan Aloni : > > [...] > > > The problem with large MTU is external memory fragmentation in > > > the buddy system following high workload, causing alloc_skb() to > > > fail. > > > > If the issue hits the Rx path, it is probably the responsibility of > > the device driver. Which kind of hardware do you use ? > > We are using a SuperMicro board and the network driver is e1000. The > revision of the chipset is 82546GB-copper (maps to e1000_82546_rev_3). > > This particular chipset does not support packet splitting, so we > are looking for a hack on the skb layer. > > -- > Dan Aloni > da-x@monatomic.org, da-x@colinux.org, da-x@gmx.net > - > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >