Messages in this thread | | | Subject | Re: 2.2.13 ISDN funnies | Date | Thu, 28 Oct 1999 13:24:35 +0100 (BST) | From | Alan Cox <> |
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> e.g. a eth0 and a syncppp interface. > A packet comes from the ethernet, the ethernet devices allocates the skb for > it (I think with no additional headroom, because it don't know about the > destination of this packet) then it is send to the network stack, which > send it to the syncppp device. > Which function allocates skb with the right headroom ?
Firstly there is a magic 16 byte slop allocated to handle this, secondly the IP code catches the odd packets it fails to cover and reallocs them to fit the required driver headroom
> > I really doubt that the problem is caused inside the linux network layers. > > Otherwise, the same bug would trigger skb_uflow panics with any > > net_device driver. > > I heared similar problems with ppp over ethernet and normal ppp.
There was a sign bug months ago with this that bit Alpha users for one. That was fixed. Other than that we haven't seen anything. So right now I believe the bug is in the isdn layers or whatever they call.
It could be a compressor bug, that is the obvious candidate. Do people see it with all the compression disabled ?
Alan
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