Re: bridge/netfilter: regression in

From: Eric Dumazet
Date: Mon Jun 06 2011 - 09:18:22 EST

Le lundi 06 juin 2011 Ã 09:13 -0400, Neil Horman a Ãcrit :

> Ok, this makes sense to me now, thanks. The change to the dst initalization to
> mark our fake routing table as read only means we need a cow_metrics method to
> copy the metrics before we we can compete the dst_metric_set in br_change_mtu.
> Thats fine, but given that its really a fake routing table with only one dst
> entry which (I think) is only written under the rtnl lock, why not just modify
> the dst_init_metrics call so that its not marked as read-only?

It _is_ read-only, its even a "const", so if you do that you'll trap if
kernel const pages are RO

Please check commit 0972ddb237 for a proper way to deal with this.

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