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On Oct 29, 2021, at 07:39, Julien Rey via lustre-discuss <<a href="mailto:lustre-discuss@lists.lustre.org" class="">lustre-discuss@lists.lustre.org</a>> wrote:<br class="">
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<div class="">Hello,<br class="">
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This may not be related directly to Lustre, but here's what I get when I try to mount our Lustre filesystem on one of our compute node running CentOS 7:<br class="">
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Oct 29 14:30:20 gpu-node8 kernel: SLUB: Unable to allocate memory on node -1 (gfp=0x8050)<br class="">
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There doesn't look to be anything "wrong" here, -1 means "no specific node", and the GFP mask is __GFP_ZERO | __GFP_IO | __GFP_WAIT for this kernel.</div>
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<div>One time I saw problems like this, it was because all the DIMMs were installed on one socket of a dual-socket NUMA motherboard, and no memory was available on the other socket, but only some allocations failed.</div>
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<div>Cheers, Andreas</div>
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<div class="">Oct 29 14:30:20 gpu-node8 kernel: cache: dm_rq_target_io, object size: 136, buffer size: 136, default order: 0, min order: 0<br class="">
Oct 29 14:30:20 gpu-node8 kernel: node 1: slabs: 2, objs: 60, free: 0<br class="">
Oct 29 14:30:20 gpu-node8 kernel: LustreError: 3097:0:(niobuf.c:994:ptlrpc_register_rqbd()) LNetMDAttach failed: -12;<br class="">
Oct 29 14:30:20 gpu-node8 kernel: LustreError: 3097:0:(service.c:2551:ptlrpc_main()) Failed to post rqbd for ldlm_cbd on CPT 0: -1<br class="">
Oct 29 14:30:20 gpu-node8 kernel: LustreError: 3091:0:(service.c:2917:ptlrpc_start_threads()) cannot start ldlm_cb thread #0_0: rc -1<br class="">
Oct 29 14:30:20 gpu-node8 kernel: LustreError: 3091:0:(service.c:837:ptlrpc_register_service()) Failed to start threads for service ldlm_cbd: -1<br class="">
Oct 29 14:30:20 gpu-node8 kernel: LustreError: 3091:0:(ldlm_lockd.c:3077:ldlm_setup()) failed to start service<br class="">
Oct 29 14:30:20 gpu-node8 kernel: LustreError: 3091:0:(ldlm_lib.c:462:client_obd_setup()) ldlm_get_ref failed: -1<br class="">
Oct 29 14:30:20 gpu-node8 kernel: LustreError: 3091:0:(obd_config.c:559:class_setup()) setup MGC10.0.1.70@tcp failed (-1)<br class="">
Oct 29 14:30:20 gpu-node8 kernel: LustreError: 3091:0:(obd_mount.c:202:lustre_start_simple()) MGC10.0.1.70@tcp setup error -1<br class="">
Oct 29 14:30:20 gpu-node8 kernel: LustreError: 3091:0:(obd_mount.c:1608:lustre_fill_super()) Unable to mount (-1)<br class="">
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I've been scratching my head on this one because this could just be a kernel bug but we have 3 other identical servers running the exact same versions of CentOS 7 and Lustre client and I got no problem with them.<br class="">
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Some more info:<br class="">
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[root@gpu-node8 ~]# uname -r<br class="">
3.10.0-1160.el7.x86_64<br class="">
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[root@gpu-node8 ~]# lctl --version<br class="">
lctl 2.12.7<br class="">
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[root@gpu-node8 ~]# vmstat -m |grep dm_rq_target_io<br class="">
dm_rq_target_io 60 60 136 30<br class="">
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[root@gpu-node8 ~]# free -h<br class="">
total used free shared buff/cache available<br class="">
Mem: 31G 1.4G 29G 10M 117M 29G<br class="">
Swap: 15G 0B 15G<br class="">
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I've been playing with the sysctl parameters but I don't really know what I'm doing and got no result anyway:<br class="">
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sysctl vm.overcommit_memory=1<br class="">
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sysctl vm.min_free_kbytes=90112<br class="">
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sysctl vm.overcommit_kbytes=90112<br class="">
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Any help would be greetly appreciated.<br class="">
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Thanks!<br class="">
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-- <br class="">
Julien REY<br class="">
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Plate-forme RPBS<br class="">
Modélisation Computationnelle des Interactions Protéines-Ligand (CMPLI)<br class="">
Université de Paris<br class="">
tel : 01 57 27 83 95<br class="">
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<div>Cheers, Andreas</div>
<div>--</div>
<div>Andreas Dilger</div>
<div>Lustre Principal Architect</div>
<div>Whamcloud</div>
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