busdma MFC broke ipfw fwd for RELENG_6

[Eugene Grosbein]

16.09.2011 00:14, John Baldwin пишет:
> On Thursday, September 15, 2011 12:44:32 pm Eugene Grosbein wrote:
>> Hi!
>>
>> I understand that it is "a bit" late for RELENG_6 reports as 6.4-RELEASE was out in 2008
>> but the breakage had happened due to MFC so it's possible same problem exists in newer branches.
>>
>> Long story short: I've updated my old 6.4-STABLE system for recent zoneinfo updates
>> and found the update broke 'ipfw fwd' feature: forwarded packets get corrupted,
>> routed packets go just fine.
>>
>> The commit in question has been performed in 2010/08/06:
>> http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/i386/i386/Attic/busdma_machdep.c.diff?r1=1.74.2.6;r2=1.74.2.7
>>
>> I've rolled it back using recent RELENG_6 sources and packet corruption have disappeared.
> 
> It may be a bug in the rl(4) driver?  Perhaps this is a candidate to try?
> 
> http://svnweb.freebsd.org/base?view=revision&revision=184240
> 

My system is i386 with 512MB RAM only and outgoing packets go through re(4), not rl(4).

Nevertheless, I've just applied revision 184240 to RELENG_6 manualy (it did not apply cleanly)
and reapplied MFC. The problem has returned.

Eugene Grosbein