System hung due to high load and slab cache memory usage with blocked tasks in synchronize_rcu()

Issue

• The system hung due to high load and slab cache memory usage with blocked tasks in synchronize_rcu().
• The system ran out of memory (OOM) due to high slab cache memory usage.
• Kernel panic due to Out of memory and no killable processes.

[376019.500321] Out of memory and no killable processes...
[376019.500322] Kernel panic - not syncing: System is deadlocked on memory                
[376019.502490] CPU: 9 PID: 2 Comm: kthreadd Kdump: loaded Tainted: POEL ----------- 4.18.0-305.10.2.el8_4.x86_64 #1
[376019.503477] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 12/12/2018
[376019.504447] Call Trace:
[376019.505407]  dump_stack+0x5c/0x80
[376019.506344]  panic+0xe7/0x2a9
[376019.507260]  out_of_memory.cold.35+0x5e/0x82
[376019.508223]  __alloc_pages_slowpath+0xc02/0xd20
[376019.509096]  __alloc_pages_nodemask+0x283/0x2c0
[376019.509953]  allocate_slab+0x475/0x4b0
[376019.510789]  ___slab_alloc+0x401/0x5b0
[376019.511600]  ? copy_process+0x225/0x19d0
[376019.512411]  ? copy_process+0x225/0x19d0
[376019.513225]  __slab_alloc+0x1c/0x30
[376019.514020]  kmem_cache_alloc_node+0x1d5/0x230
[376019.514796]  ? __switch_to_asm+0x41/0x70
[376019.515552]  copy_process+0x225/0x19d0
[376019.516293]  ? __switch_to_asm+0x35/0x70
[376019.517047]  ? __switch_to_asm+0x41/0x70
[376019.517737]  ? __switch_to_asm+0x35/0x70
[376019.518405]  ? kthread_flush_work_fn+0x10/0x10
[376019.519062]  ? __switch_to_asm+0x35/0x70
[376019.519736]  _do_fork+0x8f/0x350
[376019.520385]  kernel_thread+0x25/0x30
[376019.521009]  kthreadd+0x2b4/0x300
[376019.521694]  ? kthread_create_on_cpu+0xa0/0xa0
[376019.522288]  ret_from_fork+0x1f/0x40