Date: Fri, 15 Jun 2007 09:23:50 -0700 From: Sam Leffler <sam@errno.com> To: Stefan Ehmann <shoesoft@gmx.net> Cc: freebsd-current@freebsd.org Subject: Re: LOR in iwi with new 802.11 work Message-ID: <4672BD16.70707@errno.com> In-Reply-To: <200706151044.32493.shoesoft@gmx.net> References: <200706141641.54668.shoesoft@gmx.net> <467169F6.7020206@errno.com> <200706151044.32493.shoesoft@gmx.net>
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Stefan Ehmann wrote: > On Thursday 14 June 2007 18:16:54 Sam Leffler wrote: >> Stefan Ehmann wrote: >>> After the system is up for about 5 minutes, I see this LOR. Haven't seen >>> it posted yet. >>> >>> Stefan >>> >>> lock order reversal: >>> 1st 0xc2e4700c ieee80211com (802.11 com lock) >>> @ /usr/src/sys/net80211/ieee80211_scan.c:523 >>> 2nd 0xc2e48400 iwi0 (network driver) >>> @ /usr/src/sys/modules/iwi/../../dev/iwi/if_iwi.c:1908 > ... >> Yes, known and can safely be ignored. > > Okay, thanks. > > Another problem I've noticed (don't want to start a new thread): > > Before the latest commit, I've never seen dropouts in the connnection. > > But now I've seen for the second time that the connection drops for some > seconds. ifconfig shows no IP address. At least it recovers, but open > connections die. > > In dmesg I see: > > Jun 15 10:34:25 something kernel: iwi0: firmware stuck in state 4, resetting > Jun 15 10:34:25 something kernel: iwi0: link state changed to DOWN > Jun 15 10:34:28 something kernel: iwi0: link state changed to UP > > Is this a known issue? Do you need any more info? Andrew already responded but if you want to disable bg scanning do: ifconfig iwi0 -bgscan though that won't help resolve the issue. You can also see what's going on at the 802.11 level with: wlandebug -i iwi0 scan FWIW I ran my 2195 card for many days w/ bg scanning and saw zero dropouts (including doing a full xorg portupgrade over wireless). My canonical test is to associate, run ping to a station on the far side of the ap, and then verify bg scanning doesn't cause any ping packets to be dropped. Samhome | help
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