Re: KERNEL: assertion (tp->lost_out == 0) failed at tcp_input.c(1202):tcp_remove_reno_sacks

Kurt Roeckx
2001-04-15T21:01:35Z

On Sat, Apr 14, 2001 at 04:42:54PM +0200, Kurt Roeckx wrote:
> While running 2.4.3, I saw the following message a few times:
>
> KERNEL: assertion (tp->lost_out == 0) failed at
> tcp_input.c(1202):tcp_remove_reno_sacks

Nobody seems to be intrested in fixing this bug?

Anyway, I was looking at some statistics of the box, which I
think might be related to this problem.

netstat -s shows this under TCP:

Tcp:
11681 active connections openings
0 passive connection openings
84689 failed connection attempts
0 connection resets received
94 connections established
10963047 segments received
11476087 segments send out
392891 segments retransmited
772 bad segments received.
24083 resets sent

It seems it has to retransmit 3.4% of the TCP segments, which is
rather high.

The box is just up for 10 days, this means it has to retransmit
about .45 segments / second, and the rate seems to be going up.

I hope this helps.

If there is anything else I can do, please ask.

Kurt