linux-kernel - Network "freeze/lost"

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Date:	Thu, 28 Jun 2007 16:49:27 +0200
From:	serge <lkm@...-linux.com>
To:	linux-kernel@...r.kernel.org
Subject: Network "freeze/lost"

Hello everybody.

First of all, excus emy (poor) english, i'm french.

I have a big trouble with several server, web server. They are debian 
sarge based.

Program that run on it are principally Apache2, PHP5, Zend cluster with 
session management, Postfix and NFS client

Theses servers work well and, suddendly, one of them lost network.

Let me describe when i say "lost network":
- The server doesn't answer to a ping, all network application on it 
doesn't anwer too
- The server can't ping another server, or make another network connection
- The server loose NFS communication with the NFS server
- On the console, if i type ifconfig i see the interface configured with 
it's own IP
- On the console if i launch iptraf i only see icmp host unrechable message
- On the console if i type "mii-tool" it say that link is 100FX 
negociated and link is UP
- The only way i have found to solve the trouble is to launch 
"/etc/init.d/network restart". the network come back.
- When the server "lost" network, i don't have any message even with 
debug activated on kernel
- When i restart network, i have these kernel message (seems to be 
"normal"):

92554.221511] PM: Writing back config space on device 0000:02:02.0 at 
offset b (was 164814e4, writing d00e11)
[492554.221528] PM: Writing back config space on device 0000:02:02.0 at 
offset 3 (was 804000, writing 804010)
[492554.221534] PM: Writing back config space on device 0000:02:02.0 at 
offset 2 (was 2000000, writing 2000010)
[492554.221540] PM: Writing back config space on device 0000:02:02.0 at 
offset 1 (was 2b00000, writing 2b00146)
[492554.525866] PM: Writing back config space on device 0000:02:02.0 at 
offset b (was 164814e4, writing d00e11)
[492554.525883] PM: Writing back config space on device 0000:02:02.0 at 
offset 3 (was 804000, writing 804010)
[492554.525889] PM: Writing back config space on device 0000:02:02.0 at 
offset 2 (was 2000000, writing 2000010)
[492554.525895] PM: Writing back config space on device 0000:02:02.0 at 
offset 1 (was 2b00000, writing 2b00146)
[492556.321312] tg3: eth0: Link is up at 100 Mbps, full duplex.
[492556.321334] tg3: eth0: Flow control is on for TX and on for RX.

- Theses server are IP statics (not DHCP client).
- This is not cable or switch trouble (servers are on different switch)
- They are kernel 2.6.19.3, but we have the same trouble with other 
kernel like 2.6.17.1

I attach you some information about server, like lspci -vvv, config.gz.

Thanks for reading me and for your help.

-- 
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View attachment "lscpi_vvv.txt" of type "text/plain" (15183 bytes)

Download attachment "config.gz" of type "application/gzip" (7471 bytes)