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<p class="MsoNormal"><span style="color:#1F497D">Leonid Can you answer the questions below.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">In general the assert happens when disabling the mlx4_bus driver<o:p></o:p></span></p>
<p class="MsoNormal"><span style="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""> Smith, Stan [mailto:stan.smith@intel.com]
<br>
<b>Sent:</b> Friday, July 22, 2011 1:23 AM<br>
<b>To:</b> Uri Habusha<br>
<b>Cc:</b> ofw@lists.openfabrics.org; Leonid Keller; Tzachi Dar; Gilad Margalit; Benyahu Mizrahi<br>
<b>Subject:</b> RE: issue with checkin# 3122<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks for the note, I’ll look into ASAP.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Some questions:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">When you mention low-level driver you are speaking of the HCA driver?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Does the CL_ASSERT() fire if the registry entry ioc_poll_interval == 30000?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Is the system which CL_ASSERT()’ed attached to a fabric which has an IB target device (IOC/IOU)?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">What user-level events occurred before the HCA was disabled? Anything interesting? Perhaps a ‘devcon rescan’?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">If p_ctx is NULL then the port object has been destroyed. The issue, I’m guessing at this point, might be a race between PNP and port_destroy()?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">A missing lock call perhaps?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Will let you know.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Stan.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="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""> Uri Habusha [mailto:urih@mellanox.co.il]
<br>
<b>Sent:</b> Thursday, July 21, 2011 4:49 AM<br>
<b>To:</b> Smith, Stan<br>
<b>Cc:</b> ofw@lists.openfabrics.org; Leonid Keller; Tzachi Dar; Gilad Margalit; Benyahu Mizrahi<br>
<b>Subject:</b> issue with checkin# 3122<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Hi Stan,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I adopted your checkin# 3122 - IOC poll on demand.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">When disabling the drive an ASSERT is popup. The ASSERT is in following code in port_mgr_pnp_cb function</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> CL_ASSERT( p_ctx ); <span style="font-family:Wingdings">
ç</span> The problematic assert<o:p></o:p></p>
<p class="MsoNormal"> if (p_ctx)<o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> p_bfi = p_ctx->p_bus_filter;<o:p></o:p></p>
<p class="MsoNormal"> CL_ASSERT( p_bfi );<o:p></o:p></p>
<p class="MsoNormal"> if (p_bfi->p_port_mgr->active_ports > 0)<o:p></o:p></p>
<p class="MsoNormal"> cl_atomic_dec( &p_bfi->p_port_mgr->active_ports );<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"> port_mgr_port_remove( (ib_pnp_port_rec_t*)p_pnp_rec );<o:p></o:p></p>
<p class="MsoNormal"> break;<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I noticed that in the port_mgr_port_remove there is a check if the ctx is valid or not. So I guess it’s a known issue that can happen. For now I removed the assert in our code.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Please take a look in the code and see if it’s valid fix (if so please change ofw code accordingly) or debug the issue. It happens when disable \enable the low level driver.</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Uri<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D">Uri Habusha</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D">Windows SW Development Lead</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Mellanox Technologies<br>
</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">P.OBox 586, Yokneam 20692</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Israel</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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