Re: Kernel deadlock using nbd over acenic driver.

[Steven Whitehouse <steve@gw.chygwyn.com>]

Hi,

What kernel version are you using ? I suspect that its not the ethernet
driver causing this deadlock. Am I right in thinking that if you kill the
nbd server process that the hanging process is released ?

Steve.

> 
> Hi,
> 
> I encounter a deadlock situation when using nbd device over gigabit
> ethernet. The network card is 3c 985 giga card using acenic driver. When the
> network has some significant back ground traffic, even making a ext2 file
> system can not succeed. When the deadlock happens, the nbd client daemon
> just stuck in tcp_recvmsg() without receiving any data, and the sender
> threads continue to send out requests until the whole system hangs. Even I
> set the nbd client daemon SNDTIMEO, the nbd client daemon could not exit
> from tcp_recvmsg(). 
> 
> Is there any known problem with the acenic driver? How can I identify it is
> a problem of the NIC driver, or somewhere else?
> 
> Thanks for help!
> 
> 
> Xiangping Chen 
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