Re: cups slow on linux-2.6.24

[Patrick McHardy]

Jozsef Kadlecsik wrote:
> Hi Jeff,
>
> On Thu, 31 Jan 2008, Jeff Chua wrote:
>
> > On the bad run, I got the following message ...
> >
> > boston kernel: nf_ct_tcp: invalid packed ignored IN= OUT=
> > SRC=127.0.0.1 DST=127.0.0.1 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=8162
> > DF PROTO=TCP SPT=1016 DPT=515 SEQ=3834958843 ACK=0 WINDOW=32792
> > RES=0x00 SYN URGP=0 OPT (0204400C0402080A0000CC190000000001030307)
> > UID=0 GID=65534
>
> I can't find this packet in the last lo.bad pcap file. Could you dump the 
> bad traffic and send it together with the generated log record?
>
> Strange, but there are a lot of incorrect checksum packets. How does it 
> come on the loopback interface?


Loopback doesn't perform full checksumming, so thats expected.
Current kernel versions can tell userspace that its only a
partial checksum, but I'm not sure whether tcpdump already
supports this.
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