From owner-freebsd-current@FreeBSD.ORG Tue Jul 21 20:05:48 2009 Return-Path: Delivered-To: freebsd-current@FreeBSD.org Received: from [127.0.0.1] (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by hub.freebsd.org (Postfix) with ESMTP id A82F71065687; Tue, 21 Jul 2009 20:05:47 +0000 (UTC) (envelope-from jkim@FreeBSD.org) From: Jung-uk Kim To: freebsd-current@FreeBSD.org Date: Tue, 21 Jul 2009 16:05:34 -0400 User-Agent: KMail/1.6.2 References: <4A660E83.6080004@cs.duke.edu> In-Reply-To: <4A660E83.6080004@cs.duke.edu> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200907211605.40390.jkim@FreeBSD.org> Cc: Andrew Gallatin Subject: Re: loader.conf ignores setting variable ending in _type X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 21 Jul 2009 20:05:48 -0000 On Tuesday 21 July 2009 02:52 pm, Andrew Gallatin wrote: > Hi, > > I maintain the mxge (10GbE) driver. A user complained to me > that one of my driver's tunables was ignored when he set it > in /boot/loader.conf. I reproduced his problem both on -current > and 7.2. I think there may be some quirk which is causing the > loader to ignore this variable, but my 4th skills are non-existent, > and I'm looking for some help. > > To reproduce this bug, I used a loader.conf which > looks like this: > > console=comconsole > if_mxge_load="YES" > mxge_eth_z8e_load="YES" > mxge_rss_eth_z8e_load="YES" > hw.mxge.rss_hash_type="2" > hw.mxge.max_slices="2" > > > > After interrupting the boot, I could confirm that rss_hash_type > was not set: > > .................................................................. > Hit [Enter] to boot immediately, or any other key for command > prompt. Booting [/boot/kernel/kernel] in 8 seconds... > > Type '?' for a list of commands, 'help' for more detailed help. > OK show hw.mxge.max_slices > 2 > OK show hw.mxge.rss_hash_type > variable 'hw.mxge.rss_hash_type' not found > ................................................................... > > I have no problem setting hw.mxge.rss_hash_type while the machine > is up via kenv. Also, it seems to stick when set manually from the > loader. > > > After poking around for quite a while, I noticed that the loader > refuses to honor any variable ending in _type loaded from > loader.conf. > > Is this because the suffix "_type" (for module_type) is somehow > reserved and I should not be using a tunable ending in _type > Or is this a bug in the loader? Yes, it is reserved. loader.conf(5): *_type Defines the module's type. If none is given, it defaults to a kld module. Jung-uk Kim