System ran out of memory due to an unreclaimable kmalloc-4k slab consumption by the vxio module

Issue

• The system ran out of memory due to an unreclaimable kmalloc-4k slab usage.

[127581.832206] Unreclaimable slab info:
[127581.832207] Name                      Used        Total
...
[127581.833215] kmalloc-4k          11251696KB   11251696KB
...
[127581.834852] Kernel panic - not syncing: Out of memory: system-wide panic_on_oom is enabled
[127581.834924] CPU: 3 PID: 2681738 Comm: vxnetd Kdump: loaded Tainted: POE ---------- 4.18.0-553.30.1.el8_10.x86_64 #1
[127581.834972] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020
[127581.835013] Call Trace:
[127581.835028]  dump_stack+0x41/0x60
[127581.835048]  panic+0xe7/0x2ac
[127581.835066]  out_of_memory.cold.36+0x2f/0x7e
[127581.835089]  __alloc_pages_slowpath+0xbf0/0xcd0
[127581.835113]  __alloc_pages_nodemask+0x2e2/0x330
[127581.835135]  __vmalloc_node_range+0x13f/0x250
[127581.835157]  __vmalloc_node+0x36/0x60
[127581.835176]  ? vol_alloc+0x165/0x270 [vxio]
[127581.835351]  vol_alloc+0x165/0x270 [vxio]
[127581.835499]  vol_zalloc+0xe/0x30 [vxio]
[127581.835641]  kmsg_sys_rcv+0xc3/0x1c0 [vxio]
[127581.835722]  ? free_debug_processing+0x3e8/0x4c0
[127581.835746]  ? nmcom_deliver+0x110/0x330 [vxio]
[127581.835904]  ? kfree+0x22e/0x250
[127581.835921]  nmcom_get_next_mblk+0x8e/0xf0 [vxio]
[127581.836055]  nmcom_get_hdr_msg+0x108/0x200 [vxio]
[127581.836221]  nmcom_get_next_msg+0x7d/0x100 [vxio]
[127581.836357]  nmcom_wait_msg_tcp+0x97/0x160 [vxio]
[127581.836494]  nmcom_server_proc_tcp+0x58/0xe0 [vxio]
[127581.836630]  nmcom_server_main_tcp+0x4ce/0x11d0 [vxio]
[127581.836765]  ? arch_stack_walk+0x8f/0x100
[127581.836786]  ? ret_from_fork+0x1f/0x40
[127581.836808]  ? update_load_avg+0x7e/0x710
[127581.836830]  ? __schedule+0x2d9/0x870
[127581.836848]  ? nmcom_server_proc_tcp+0xe0/0xe0 [vxio]
[127581.837375]  kthread+0x134/0x150
[127581.837625]  ? set_kthread_struct+0x50/0x50
[127581.837826]  ret_from_fork+0x1f/0x40