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<TITLE>RE: [openib-general] matching an RMPP NACK to send or receive?</TITLE>
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<P><FONT SIZE=2>I was referring to the way TID is built only to say that TID made by the kernel should try and use some way to identify kernel A from kernel B.</FONT></P>
<P><FONT SIZE=2>If a TID is built out of PID and sequential number then using a TID with PID prefix of zero for Kernel generated transaction would cause more TID collisions. </FONT></P>
<P><FONT SIZE=2> -----Original Message-----</FONT>
<BR><FONT SIZE=2>From: Sean Hefty [<A HREF="mailto:mshefty@ichips.intel.com">mailto:mshefty@ichips.intel.com</A>] </FONT>
<BR><FONT SIZE=2>Sent: Friday, July 15, 2005 12:02 AM</FONT>
<BR><FONT SIZE=2>To: Eitan Zahavi</FONT>
<BR><FONT SIZE=2>Cc: 'Sean Hefty'; openib-general@openib.org</FONT>
<BR><FONT SIZE=2>Subject: Re: [openib-general] matching an RMPP NACK to send or receive?</FONT>
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<P><FONT SIZE=2>Eitan Zahavi wrote:</FONT>
<BR><FONT SIZE=2>> EZ: TID should consist of a client selected part and process ID. For kernels</FONT>
<BR><FONT SIZE=2>> I would select some part of the GUID too.</FONT>
<BR><FONT SIZE=2>> We need to minimize cases of same TID use. But in such case - abort both of</FONT>
<BR><FONT SIZE=2>> them.</FONT>
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<P><FONT SIZE=2>I don't think that the receive handling code should make any assumptions </FONT>
<BR><FONT SIZE=2>about the format of the TID. Aborting both transactions seems a little </FONT>
<BR><FONT SIZE=2>harsh, but not sure if there's another way. For now, the code will only </FONT>
<BR><FONT SIZE=2>abort a send, which should be the more common case. I will need to add </FONT>
<BR><FONT SIZE=2>aborting receives later and assume that actual TID collisions would be </FONT>
<BR><FONT SIZE=2>extremely rare.</FONT>
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<P><FONT SIZE=2>The RMPP status does help indicate whether a send or receive is being </FONT>
<BR><FONT SIZE=2>aborted, but not in all cases.</FONT>
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<P><FONT SIZE=2>- Sean</FONT>
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