Re: DDoS attack causing bad effect on conntrack searches

Eric Dumazet
2010-04-23T07:46:20Z

Le vendredi 23 avril 2010 à 09:23 +0200, Jan Engelhardt a écrit :
> On Thursday 2010-04-22 23:28, Jesper Dangaard Brouer wrote:
>
> > On Thu, 22 Apr 2010, Eric Dumazet wrote:
> >
> >> What exact version of kernel are you running ?
> >
> > 2.6.31.7-pvlan2G #3 SMP PREEMPT
> > 32-bit kernel with 2G kernel mem (you showed me that trick).
>
> Since when is enabling 2G a trick? :)
> There's CONFIG_VMSPLIT_2G (and 2G_OPT) for quite some time now.
>

Yes, when you know it, its not a trick anymore :)

Years ago, we had to manually change PAGE_OFFSET, and I remember some
machines with PAGE_OFFSET 0xA0000000 (1.5 GB LOWMEM),
or 0xB0000000 (1.25 GB), (PAE off)

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