From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dick Hollenbeck Subject: Re: KS8695: possible NAPI issue Date: Tue, 02 Mar 2010 23:01:29 -0600 Message-ID: <4B8DED29.9000605@softplc.com> References: <4B8D1C02.1010204@softplc.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Yegor Yefremov , netdev@vger.kernel.org, zealcook@gmail.com To: figo zhang Return-path: Received: from kcmailp04.birch.net ([216.212.0.99]:57230 "EHLO mx01.birch.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750746Ab0CCFBJ (ORCPT ); Wed, 3 Mar 2010 00:01:09 -0500 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: figo zhang wrote: > 2010/3/2 Dick Hollenbeck : > >> Yegor Yefremov wrote: >> >>> I'm using 2.6.33 kernel and I noticed such a strange behavior: >>> >>> after system start I transfer one file via netcat from my development >>> host, after this transfer the network is not functioning i.e. no pings >>> possible etc. >>> >>> To narrow down the problem I checked out this commit >>> >>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=451f14439847db302e5104c44458b2dbb4b1829d. >>> Till here the network driver is functioning as intended, but after >>> NAPI introduction I have this issue. With latest git-pull of "Linus' >>> kernel tree" I can't even ping right after the systems start. >>> >>> Any Ideas? What am I missing? >>> >>> >> No idea, although I am using the same ARM chip, my kernel is at 2.6.30.5, >> and except for this occasional loss of connection I get, the ethernet driver >> seems to work better than what you are reporting. >> > > from linux-2.6.32, this ethernet driver have add NAPI support, would > you like to > try using this version? > Seems like a lot of work for me, given that my 2.6.30.5 kernel is mostly working. Yegor is having the problems on the newer kernels, newer than mine. Sounds like a warning flag to me, not an incentive. What is NAPI and why do I care? Dick