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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Probably a deadlock stalling IBAL’s PnP event callback thread
(there’s only one system wide). IPoIB depends on the PnP event callback to do
all its resource creation/destruction because it generally gets called at
DISPATCH_LEVEL and there’s very little it can do with the HCA driver. The HCA
driver’s design requires blocking for all verb operations despite the hardware
processing commands asynchronously and notifying of their completions form the
DPC.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>-Fab<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
ofw-bounces@lists.openfabrics.org [mailto:ofw-bounces@lists.openfabrics.org] <b>On
Behalf Of </b>Sufficool, Stanley<br>
<b>Sent:</b> Friday, May 16, 2008 4:16 PM<br>
<b>To:</b> ofw@lists.openfabrics.org<br>
<b>Subject:</b> [ofw] SRP Target Disconnect still hangs IPoIB<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Seems
that RC4 has the same issue with SRP hanging other IPoIB when the target quits
without the initiator first performing a clean "Eject" of the target
device.</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Reproduced
by: </span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Start
target (OFED Gen2 SRPT) </span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Start
WinIB initiators</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Unload
target driver (rmmod ib_srpt)</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>WinIB
initiators IPoIB complains "LAN Conn.. Network Cable Is Unplugged"</span><o:p></o:p></p>
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