Re: crash in tcp_fragment

Ilpo,

Thanks for the answers.  This gives me some clarity on how to address
the problem.


Tim Hartrick

On Tue, 2012-02-28 at 01:18 +0200, Ilpo Järvinen wrote:

On Sun, 26 Feb 2012, Tim Hartrick wrote:

quoted

	We have been seeing the crash cited below on a number of our systems
running kernel version 2.6.34, 2.6.36 and 2.6.38 using a number of
different GigE controllers.  I note that commit
2fceec13375e5d98ef033c6b0ee03943fc460950 introduced a band-aid for the
problem by replacing the BUG_ON() to a WARN().  I have two questions
related to this.

1) Is there a fix for the root cause?  Can I get a pointer to the commit
that claims to address the root cause?

There have been multiple fixes recently on the counters which this code 
depends on, however, nobody has afaict fully analyzed what else those 
fixed.

quoted

2) Will disabling GSO/TSO make the problem go away?  That is, is
something related to GSO/TSO at the root of the problem?

Very likely.