Why does 'page allocation failure: order:7' reported through ip_set_net_init() function of 'ip_set' module?

Solution Verified - Updated -

Issue

  • Multiple page allocation failure messages reported thorough ip_set_net_init() function.
  • page allocation failure: order:7
    • The order may eventually vary from 4 to 7.
[45633.382912] falcon-task: page allocation failure: order:7, mode:0xc0d0
[45633.383082] CPU: 17 PID: 23981 Comm: falcon-task Kdump: loaded Tainted: P           OE  ------------   3.10.0-1160.88.1.el7.x86_64 #1
[45633.383398] Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 05/17/2022
[45633.383710] Call Trace:
[45633.383887]  [<ffffffff9d9b1bec>] dump_stack+0x19/0x1f
[45633.384054]  [<ffffffff9d3cfa70>] warn_alloc_failed+0x110/0x180
[45633.384222]  [<ffffffff9d3d474f>] __alloc_pages_nodemask+0x9ef/0xbf0
[45633.384387]  [<ffffffff9d4259d8>] alloc_pages_current+0x98/0x110
[45633.384550]  [<ffffffff9d3f17a8>] kmalloc_order+0x18/0x50
[45633.384714]  [<ffffffff9d431776>] kmalloc_order_trace+0x26/0xa0
[45633.384887]  [<ffffffff9d435801>] __kmalloc+0x221/0x240
[45633.385060]  [<ffffffffc35e0f68>] ip_set_net_init+0x58/0xb0 [ip_set]
[45633.385234]  [<ffffffff9d873a64>] ops_init+0x44/0x160
[45633.385398]  [<ffffffff9d873c3b>] setup_net+0xbb/0x170
[45633.385560]  [<ffffffff9d87440d>] copy_net_ns+0xbd/0x180
[45633.385723]  [<ffffffff9d2d0a09>] create_new_namespaces+0xf9/0x180
[45633.385895]  [<ffffffff9d2d0c5a>] unshare_nsproxy_namespaces+0x5a/0xc0
[45633.386066]  [<ffffffff9d29eccb>] SyS_unshare+0x1db/0x350
[45633.386230]  [<ffffffff9d9c539a>] system_call_fastpath+0x25/0x2a

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8.0
  • IP sets feature used (ip_set module loaded) - for example from withing a firewall rules

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