Re: sky2 driver - large files upload problem

[Jon Wikne <wikne@cheetah.uio.no>]

Stephen Hemminger wrote:

> On Mon, 21 Aug 2006 16:21:07 +0200
> Jon Wikne <wikne@cheetah.uio.no> wrote:
> 
>>Daniel Drake wrote:
>>
>>>Jon Wikne wrote:
>>>
>>>>What happens is typically this: After transeferring some
>>>>data, ranging from less than 100kB to 10MB, the upload freezes,
>>>>i.e. gets no further. Use of ping shows the connection is
>>>>effectively dead. If I do a sequence /sbin/ifdown eth0
>>>>/sbin/ifup eth0 the upload might resume, but stops again
>>>>shortly. The phenomenon seems to occur sooner if the path
>>>>to the remote system is _fast_ (low ping times).
>>>
>>>You can try applying this patch:
>>>http://developer.osdl.org/shemminger/prototypes/sky2-proc-debug.patch
>>>
>>>It will add a /proc/net/sky2/ethX file, which lists the status of the TX 
>>>and status rings. You should compare the contents of this file during 
>>>normal operation to when the interface has hung.
>>
>>Thanks, Daniel. I applied the patch.
>>
>>The output of 'cat /proc/net/sky2/eth0' under normal circumstances
>>is here:
>>
>>http://puma.uio.no/sky2/sky2-status-normal.txt
>>
>>After the interface hangs, 'cat /proc/net/sky2/eth0' causes the
>>whole computer to hang completely. No kernel oops or other
>>messages in the console window. Power down is the only
>>solution.... :-[ No log entries after reboot.
>>
> It could be the code in the debug patch is walking off into space.
> The smaller version of the same patch, doesn't walk but just reports
> the index values.
[ patch ]

OK, I applied that. Part of it (5 hunks) had to be done manually, since
it appeared not to be relative to the version in 2.6.18-rc4 which I was
using.

The result is:

Normal operation:
Status ring (empty)
Tx ring (empty)
Rx pending hw get=60 put=256 last=511

Error condition:
Status ring (empty)
Tx ring 338..378
Rx pending hw get=316 put=0 last=511


-- Jon