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Re: 2.6.11 on AMD64 traps

To: Michal Vanco <vanco@xxxxxxxx>
Subject: Re: 2.6.11 on AMD64 traps
From: Patrick McHardy <kaber@xxxxxxxxx>
Date: Wed, 09 Mar 2005 21:34:56 +0100
Cc: netdev@xxxxxxxxxxx, Andre Tomt <andre@xxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, "David S. Miller" <davem@xxxxxxxxxxxxx>
In-reply-to: <200503092124.35190.vanco@satro.sk>
References: <200503081900.18686.vanco@satro.sk> <422DF07D.7010908@tomt.net> <422F525F.90404@trash.net> <200503092124.35190.vanco@satro.sk>
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Michal Vanco wrote:
On Wednesday 09 March 2005 20:45, Patrick McHardy wrote:

This patch should fix it. The crash is caused by stale pointers, the pointers in fib_iter_state are not reloaded after seq->stop() followed by seq->start(pos > 0).

Well. Trap vanished after applying this patch, but another weird thing occurs:

# ip route show | wc -l
156033
# date; time ip route show > /dev/null; date; time netstat -rn > /dev/null
Wed Mar  9 22:15:21 CET 2005

real    0m0.656s
user    0m0.415s
sys     0m0.242s
Wed Mar  9 22:15:22 CET 2005

real    6m41.472s
user    0m1.261s
sys     6m40.143s

Yes, I know it is totally inefficient. Just use ip route, which doesn't suffer from this problem.

Regards
Patrick

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