Re: Longstanding networking / SMP issue? (duplextest)

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   From: Simon Kirby <sim@netnation.com>
   Date: Thu, 10 Jul 2003 16:29:16 -0700

   Hmm... Is this issue (ICMP packets being dropped due to lazy locking)
   supposed to be fixed in current 2.4 (2.4.22pre4, for example)?

Yes, it is.
   
   I checked the code and the patch appears to be in there.  I wonder what
   is causing the loss now... tcpdump on the machine being pinged shows
   it not responding to all of the ICMP it receives, as was happening
   before.

Check if icmpv4_xrlim_allow() is returning zero ever, I bet it
is.  Setting sysctl_icmp_ratemask to zero would be a good
test to eliminate this as a culprit.
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