netdev - Re: KS8695: possible NAPI issue

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Message-ID: <f69abfc31003050700y57718a6aje3c1ff41d04748ae@mail.gmail.com>
Date:	Fri, 5 Mar 2010 16:00:11 +0100
From:	Yegor Yefremov <yegorslists@...glemail.com>
To:	"Figo.zhang" <figo1802@...il.com>
Cc:	Dick Hollenbeck <dick@...tplc.com>, netdev@...r.kernel.org,
	zealcook@...il.com
Subject: Re: KS8695: possible NAPI issue

>> My tests look like following:
>>
>> 1. system start
>> 2. ping one host: O.K.
>> 3. nc -l -p 5000 > /var/test (about 1Mb): O.K.
>> 4. ping the same host: failed
> 1. type "arp" command, see the arp is exit or expire?

debian:~# nc -l -p 5000 > /var/zImage

debian:~# ping -c 1 192.168.1.38

PING 192.168.1.38 (192.168.1.38) 56(84) bytes of data.

>From 192.168.1.66 icmp_seq=1 Destination Host Unreachable



--- 192.168.1.38 ping statistics ---

1 packets transmitted, 0 received, +1 errors, 100% packet loss, time 0ms



debian:~# arp

Address                  HWtype  HWaddress           Flags Mask            Iface
192.168.1.38          (incomplete)                              eth0

192.168.1.36             ether   00:10:18:39:19:aa   C                     eth0


> 2. at this point, see is it still have RX interrpt and receive packet in
> ks8695_rx()? (in some watchpoint add printk).

I've inserted some printks and I can see that interrupts are coming
and the received count will be increased. I can also see my system
sending arp requests. Even this ping request is visible in wireshark
and its reply, but the ping utility sees nothing of it.
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