Which Fujitsu Server systems are certified to support sub-NUMA clustering (SNC) on Red Hat Enterprise Linux 7?

Solution Verified - Updated -

Environment

  • FUJITSU Server PRIMEQUEST
  • FUJITSU Server PRIMERGY
  • Red Hat Enterprise Linux 7

Resolution

This Red Hat Knowledgebase solution is associated with Fujitsu Server systems that have been certified on Red Hat Enterprise Linux 7 with the sub-NUMA clustering (SNC) feature enabled. Unless otherwise noted, the systems are certified in SNC and non-SNC modes on the same update release of Red Hat Enterprise Linux 7.

Please note that a warning message similar to the one below may appear when booting a certified Fujitsu Server system with SNC enabled. The warning can be safely ignored on certified systems associated with this knowledgebase solution, and they will perform as expected.

  [    1.336098] WARNING: CPU: 4 PID: 0 at arch/x86/kernel/smpboot.c:408 topology_sane.isra.3+0x80/0x90
  [    1.346109] sched: CPU #4's llc-sibling CPU #0 is not on the same node! [node: 1 != 0]. Ignoring dependency.
  [    1.321544] smpboot: Booting Node   1, Processors  #4
  [    1.357089] Modules linked in:
  :
  [    1.360718] CPU: 4 PID: 0 Comm: swapper/4 Not tainted 3.10.0-685.el7.x86_64 #1
  [    1.368779] Hardware name: 
  [    1.380816]  ffff8804f8d57e38 b824310fb8237c9e ffff8804f8d57de8 ffffffff816a4d39
  [    1.389127]  ffff8804f8d57e28 ffffffff81087a08 000001986f60ce40 0000000000000001
  [    1.397434]  ffff88086f6163c0 0000000000000004 0000000000000000 0000000000000004
  [    1.405743] Call Trace:
  [    1.408475]  [<ffffffff816a4d39>] dump_stack+0x19/0x1b
  [    1.414211]  [<ffffffff81087a08>] __warn+0xd8/0x100
  [    1.419657]  [<ffffffff81087a8f>] warn_slowpath_fmt+0x5f/0x80
  [    1.426074]  [<ffffffff81002806>] ? calibrate_delay+0xe6/0x8e0
  [    1.432588]  [<ffffffff81042a4b>] ? __mcheck_cpu_init_timer+0x4b/0x50
  [    1.439777]  [<ffffffff810512d0>] topology_sane.isra.3+0x80/0x90
  [    1.446483]  [<ffffffff8105152e>] set_cpu_sibling_map+0x12e/0x500
  [    1.453284]  [<ffffffff810519f1>] start_secondary+0xf1/0x230
  [    1.459601] ---[ end trace d896ed1d3d5cd63d ]---
  [    1.467360]  #5 #6 OK

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