Bare-metal nodes in the RHOCP cluster start to hang after upgrading from v4.19.14 to v4.19.18

Issue

• Bare-metal nodes in the RHOCP cluster start to hang frequently after upgrading from 4.19.14 to 4.19.18.

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 #0 [ff7d29bf8e7eb900] __schedule at ffffffff96d328d9
 #1 [ff7d29bf8e7eb968] schedule at ffffffff96d32b8e
 #2 [ff7d29bf8e7eb980] schedule_preempt_disabled at ffffffff96d32e21
 #3 [ff7d29bf8e7eb988] rwsem_down_write_slowpath at ffffffff96d3602d
 #4 [ff7d29bf8e7eba20] down_write at ffffffff96d36358
 #5 [ff7d29bf8e7eba30] prealloc_memcg_shrinker at ffffffff9638010a
 #6 [ff7d29bf8e7eba70] __prealloc_shrinker at ffffffff96380448
 #7 [ff7d29bf8e7eba80] prealloc_shrinker at ffffffff96380b3e
 #8 [ff7d29bf8e7eba90] alloc_super at ffffffff9646abf9
 #9 [ff7d29bf8e7ebac0] sget_fc at ffffffff9646bcb7
#10 [ff7d29bf8e7ebaf8] get_tree_nodev at ffffffff9646c6a3
#11 [ff7d29bf8e7ebb28] vfs_get_tree at ffffffff9646a052
#12 [ff7d29bf8e7ebb48] do_new_mount at ffffffff9649863a
#13 [ff7d29bf8e7ebb98] __x64_sys_mount at ffffffff96499aa7
#14 [ff7d29bf8e7ebbe0] do_syscall_64 at ffffffff96d228dc
#15 [ff7d29bf8e7ebf50] entry_SYSCALL_64_after_hwframe at ffffffff96e00130
    RIP: 000055b32c21348e  RSP: 000000c0002bb410  RFLAGS: 00000216
    RAX: ffffffffffffffda  RBX: 000000c0003b5216  RCX: 000055b32c21348e
    RDX: 000000c0003b5220  RSI: 000000c0003f25a0  RDI: 000000c0003b5216
    RBP: 000000c0002bb450   R8: 000000c00036bf40   R9: 0000000000000000
    R10: 0000000000000001  R11: 0000000000000216  R12: 000000c0003f25a0
    R13: 00000000000000aa  R14: 000000c000002380  R15: 0000000000000000
    ORIG_RAX: 00000000000000a5  CS: 0033  SS: 002b