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Message-ID: <20101021230724.GA5170@gondor.apana.org.au> Date: Thu, 21 Oct 2010 18:07:24 -0500 From: Herbert Xu <herbert@...dor.apana.org.au> To: Patrick Ringl <patrick_@...enet.de> Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, bridge@...ts.linux-foundation.org Subject: Re: 2.6.36-rc7: net/bridge causes temporary network I/O lockups [2] On Fri, Oct 22, 2010 at 12:18:38AM +0200, Patrick Ringl wrote: > > sorry for the late response. I've been using your patch on 2.6.36 and > unfortunately, the bogus ipv6 packet is not the cause of the lockups. I > have attached two packet dumps (br0 and eth1) again. OK I see, I had thought that your whole system locked up for 20-30 seconds but it was only the external network responses that stopped. I think the problem is your switch. It appears to purge our port entry when it receives our general query. So to work around this, I suggest that you disable the startup queries through the parameter multicast_startup_query_count. You can do this either through sysfs or a sufficiently recent brctl command. BTW, what brand/model is your switch? If this problem is common enough then we may have to disable general queries by default. Cheers, -- Email: Herbert Xu <herbert@...dor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- 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/
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