An order-10 allocation request (2¹⁰ pages = 1 MB) issued by ib_setup_port_attrs() during InfiniBand port setup fails due to a page allocation failure

Issue

• An order-10 allocation request (2¹⁰ pages = 1 MB) issued by ib_setup_port_attrs() during InfiniBand port setup fails due to a page allocation failure:

(taskname): page allocation failure: order:10, mode:0x60c0c0(GFP_KERNEL|GFP_COMP|GFP_ZERO), nodemask=(null),cpuset=/,mems_allowed=0-1
CPU: 15 PID: 3828897 Comm: (taskname) Kdump: loaded Not tainted 4.18.0-372.9.1.el8.x86_64 #1
Hardware name: HPE ProLiant DL380 Gen10/ProLiant DL380 Gen10, BIOS U30 09/03/2021
Call Trace:
dump_stack+0x41/0x60
warn_alloc.cold.119+0x7b/0x111
? _cond_resched+0x15/0x30
? __alloc_pages_direct_compact+0x157/0x160
__alloc_pages_slowpath+0xc7e/0xcc0
? kernfs_activate+0x63/0x80
__alloc_pages_nodemask+0x2db/0x310
kmalloc_order+0x28/0x90
kmalloc_order_trace+0x1d/0xa0
__kmalloc+0x1ff/0x250
ib_setup_port_attrs+0xd4/0x8a0 [ib_core]
? klist_add_tail+0x3b/0x70
add_one_compat_dev.part.25+0x1a7/0x220 [ib_core]
rdma_dev_init_net+0xf5/0x1a0 [ib_core]
ops_init+0x3a/0x100
setup_net+0xee/0x250
copy_net_ns+0xc3/0x180
create_new_namespaces+0x170/0x210
unshare_nsproxy_namespaces+0x55/0xa0
ksys_unshare+0x18f/0x350
__x64_sys_unshare+0xe/0x20
do_syscall_64+0x5b/0x1a0
entry_SYSCALL_64_after_hwframe+0x65/0xca
RIP: 0033:0x7fb718c3eaab
Code: 73 01 c3 48 8b 0d dd 13 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ad 13 2c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd86e2ee58 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 000055c0b7227088 RCX: 00007fb718c3eaab
RDX: 0000000000000000 RSI: 00007ffd86e2edc0 RDI: 0000000040000000
RBP: 00007ffd86e2ee80 R08: 0000000000000000 R09: 000055c0b7039808
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00000000fffffff5 R15: 000055c0b72309d0
Mem-Info:
    ...
Node 0 Normal: 3145*4kB (UM) 23738*8kB (UME) 5562*16kB (UMEH) 192*32kB (UMEH) 3*64kB (H) 3*128kB (H) 3*256kB (H) 1*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 299476kB
Node 1 Normal: 11607*4kB (UME) 19320*8kB (UMEH) 7355*16kB (UMEH) 1024*32kB (UMEH) 252*64kB (M) 1*128kB (H) 2*256kB (H) 2*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 369228kB