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Bug#572201: forcedeth driver hangs under heavy load

Eric Dumazet wrote:
Le mardi 13 avril 2010 à 15:27 +0100, stephen mulcahy a écrit :
Ok, I've tried both of the following with my reproducer

1. ethtool -K eth0 tso off

RESULT: reproducer causes multiple hosts to be come unresponsive on first run.

2. ethtool -K eth0 tx off

RESULT: reproducer runs three times without any hosts becoming unresponsive.


Thanks Stephen !

Now some brave fouls to check the 6410 lines of this driver ? ;)

Question of the day : Why TSO is broken in forcedeth ?
Is it generically broken or is it broken for specific NICS ?

Actually, it is only when tx-checksumming is turned off that the problem doesn't occur (so I'm not sure TSO is the problem).

Additionally, a google also turns up this existing Debian bug http://bugs.debian.org/506419 which seems to be related.


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