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* [Bug 1000347] New: FreeBSD Network Thread misses incoming packet enque in ether_demux
@ 2006-12-09 21:09 bugzilla-daemon
0 siblings, 0 replies; only message in thread
From: bugzilla-daemon @ 2006-12-09 21:09 UTC (permalink / raw)
To: ecos-bugs
http://bugzilla.ecoscentric.com/show_bug.cgi?id=1000347
Summary: FreeBSD Network Thread misses incoming packet enque in
ether_demux
Product: eCos
Version: unknown
Platform: All
OS/Version: All
Status: UNCONFIRMED
Severity: normal
Priority: high
Component: TCPIP
AssignedTo: gary@mlbassoc.com
ReportedBy: bugzilla_rmvthis@ds3switch.com
QAContact: ecos-bugs@sources.redhat.com
If the priority of the ethernet driver thread is lower (higher #) than the FreeBSD Network Thread, then the Network Thread can get prematurely woken up to process an incoming ethernet pkt before the packet is fully enqued. Specifically:
if_ethersubr:ether_demux() calls schednetisr() (which wakes up network thread) prior to the pkt being enqued with that call to IF_ENQUEUE().
This might not be obvious because a subsequent incoming packet can (partially) process the queue.
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2006-12-09 21:09 [Bug 1000347] New: FreeBSD Network Thread misses incoming packet enque in ether_demux bugzilla-daemon
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