On Sat, 2 Feb 2008 11:52:43 +0100
Petr Vandrovec <[EMAIL PROTECTED]> wrote:
> Hello,
> since I synced my tree to Linus's one two days ago, sky2's packet receiption
> dies almost instantly. Device still transmits packets, but no receive.
> Fortunately fix is simple, unfortunately I do not know why fix works...
>
> Commit f03b865491c2f30f2a4d77cdafc69c978ceb38a0 (sky2: align IP header on Rx
> if possible) stopped aligning receive buffers on devices which do not need
> HANG_CHECK. Unfortunately there is at least one device (mine, Yukon FE, rev
> 3)
> which is not happy if receive buffer is not aligned. I have no idea which
> other chips/revisions are affected as well.
>
> Without patch 'ping -f -b 192.168.101.255' RX count stops incrementing in less
> than 50 packets. With patch in place it can run like before, for hours...
> Box is an AMD rev F processor, with nVidia's MCP61 chipset.
> Petr
I don't have a Yukon FE, but I believe that the Yukon FE does have a ram
buffer, so you HANG_CHECK should be enabled for that device. You can check
by running:
ethtool -d eth0 | grep 'Ram Buffer'
With ram buffer (like XL, EC)
# ethtool -d eth0 | grep 'Ram Buffer'
Ram Buffer 0x18
No ram buffer (like EC-U, FE+, ...)
# ethtool -d eth0 | grep 'Ram Buffer'
Ram Buffer 0x00
--
Stephen Hemminger <[EMAIL PROTECTED]>
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