[cups.bugs] cups slow on linux-2.6.24

Patrick McHardy kaber at trash.net
Thu Jan 31 10:54:16 PST 2008

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= DST= 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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