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SubjectRe: Longstanding networking / SMP issue? (duplextest)
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   From: Andi Kleen <ak@suse.de>
Date: 20 Feb 2003 08:52:46 +0100

That's probably because of the lazy ICMP socket locking used for the
ICMP socket. When an ICMP is already in process the next ICMP triggered
from a softirq (e.g. ECHO-REQUEST) is dropped
(see net/ipv4/icmp_xmit_lock_bh())

Good spotting Andi.
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