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<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">this is probably
<a href="https://jira.whamcloud.com/browse/LU-12901">https://jira.whamcloud.com/browse/LU-12901</a> which is still open and was just postponed to Lustre 2.14.0.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Reducing peer_credits to 42 is a workaround.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Best regards,<br>
Karsten<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> lustre-discuss <lustre-discuss-bounces@lists.lustre.org>
<b>On Behalf Of </b>Andreas Dilger<br>
<b>Sent:</b> Wednesday, February 12, 2020 21:50<br>
<b>To:</b> Kevin M. Hildebrand <kevin@umd.edu><br>
<b>Cc:</b> lustre-discuss@lists.lustre.org<br>
<b>Subject:</b> Re: [lustre-discuss] Lustre 2.12.3 client can't mount filesystem<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal">Can you please try 2.12.4, it was just released yesterday and has a number of fixes.<o:p></o:p></p>
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<p class="MsoNormal">On Feb 12, 2020, at 13:36, Kevin M. Hildebrand <<a href="mailto:kevin@umd.edu">kevin@umd.edu</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">I just updated some of my clients to RHEL 7.7, Lustre 2.12.3, MOFED 4.7.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Server version is 2.10.8.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">I'm now getting errors mounting the filesystem on the client. In fact, I can't even do an 'lctl ping' to any of the servers without getting an I/O error.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Debug logs show this message when I attempt an lctl ping:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">00000800:00020000:0.0:1581538955.090767:0:20471:0:(o2iblnd.c:941:kiblnd_create_conn()) Can't create QP: -12, send_wr: 32634, recv_wr: 254, send_sge: 2, recv_sge: 1<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"># lctl list_nids<br>
<a href="mailto:10.11.80.65@o2ib3">10.11.80.65@o2ib3</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"># lctl ping <a href="mailto:10.11.80.50@o2ib3">
10.11.80.50@o2ib3</a><br>
failed to ping <a href="mailto:10.11.80.50@o2ib3">10.11.80.50@o2ib3</a>: Input/output error<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Interestingly, if I do an 'lctl ping' to the client _from_ the server, the ping succeeds, and from that point on pings from client _to_ server work fine until the client is rebooted or lnet is reloaded.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">ko2iblnd parameters match on clients and servers, namely:<br>
options ko2iblnd peer_credits=128 peer_credits_hiw=64 credits=1024 concurrent_sends=256 ntx=2048 map_on_demand=32 fmr_pool_size=2048 fmr_flush_trigger=512 fmr_cache=1
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Anyone have any thoughts?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Kevin<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">--<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Kevin Hildebrand<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">University of Maryland<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">Division of IT<o:p></o:p></span></p>
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<p class="MsoNormal">_______________________________________________<br>
lustre-discuss mailing list<br>
<a href="mailto:lustre-discuss@lists.lustre.org">lustre-discuss@lists.lustre.org</a><br>
<a href="http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org">http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org</a><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:black">Cheers, Andreas<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">--<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Andreas Dilger<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Principal Lustre Architect<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Whamcloud<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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