======================================
| xx__-> echo $?
| 0
| xx__-> [  228.476623][ T2190] readlink (2190) used greatest stack depth: 24352 bytes left
| [  231.341067][ T1483] iperf3 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=0
[  231.341636][ T1483] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  231.341638][ T1483] Call Trace:
[  231.341640][ T1483]  <TASK>
[ 231.341642][ T1483] dump_stack_lvl (lib/dump_stack.c:123) 
[ 231.341651][ T1483] dump_header (mm/oom_kill.c:74 mm/oom_kill.c:468) 
[ 231.341658][ T1483] oom_kill_process (mm/oom_kill.c:1041) 
[ 231.341663][ T1483] out_of_memory (mm/oom_kill.c:1180 (discriminator 4)) 
[ 231.341667][ T1483] ? __pfx_out_of_memory (mm/oom_kill.c:1113) 
[ 231.341675][ T1483] __alloc_pages_may_oom (mm/page_alloc.c:3645) 
[ 231.341682][ T1483] ? __pfx___alloc_pages_may_oom (mm/page_alloc.c:3577) 
[ 231.341694][ T1483] __alloc_pages_slowpath.constprop.0 (mm/page_alloc.c:4433) 
[ 231.341703][ T1483] ? get_page_from_freelist (mm/page_alloc.c:3235 mm/page_alloc.c:3430) 
[ 231.341707][ T1483] ? __pfx___alloc_pages_slowpath.constprop.0 (mm/page_alloc.c:4206) 
[ 231.341714][ T1483] ? lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 231.341722][ T1483] __alloc_frozen_pages_noprof (mm/page_alloc.c:4753) 
[ 231.341726][ T1483] ? __pfx___alloc_frozen_pages_noprof (mm/page_alloc.c:4706) 
[ 231.341735][ T1483] ? trace_kmem_cache_alloc (./include/trace/events/kmem.h:12 (discriminator 21)) 
[ 231.341739][ T1483] ? kmem_cache_alloc_node_noprof (mm/slub.c:4244) 
[ 231.341742][ T1483] ? __create_object (mm/kmemleak.c:766) 
[ 231.341751][ T1483] alloc_pages_mpol (mm/mempolicy.c:2303) 
[ 231.341757][ T1483] ? __pfx_alloc_pages_mpol (mm/mempolicy.c:2258) 
[ 231.341762][ T1483] ? __alloc_skb (./arch/x86/include/asm/atomic.h:28 ./include/linux/atomic/atomic-arch-fallback.h:503 ./include/linux/atomic/atomic-instrumented.h:68 ./include/linux/refcount.h:125 net/core/skbuff.c:692) 
[ 231.341771][ T1483] alloc_pages_noprof (mm/mempolicy.c:2372 mm/mempolicy.c:2392) 
[ 231.341776][ T1483] skb_page_frag_refill (net/core/sock.c:3104 net/core/sock.c:3079) 
[ 231.341781][ T1483] sk_page_frag_refill (net/core/sock.c:3115) 
[ 231.341787][ T1483] tcp_sendmsg_locked (net/ipv4/tcp.c:1206) 
[ 231.341803][ T1483] ? __pfx_tcp_sendmsg_locked (net/ipv4/tcp.c:1061) 
[ 231.341808][ T1483] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 231.341814][ T1483] ? mark_held_locks (kernel/locking/lockdep.c:4326) 
[ 231.341821][ T1483] tcp_sendmsg (net/ipv4/tcp.c:1367) 
[ 231.341825][ T1483] sock_write_iter (net/socket.c:712 net/socket.c:727 net/socket.c:1131) 
[ 231.341830][ T1483] ? __pfx_sock_write_iter (net/socket.c:1115) 
[ 231.341842][ T1483] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 231.341847][ T1483] vfs_write (fs/read_write.c:591 fs/read_write.c:684) 
[ 231.341852][ T1483] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 231.341855][ T1483] ? __pfx_vfs_write (fs/read_write.c:665) 
[ 231.341860][ T1483] ? __fget_files (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 fs/file.c:1057) 
[ 231.341872][ T1483] ksys_write (fs/read_write.c:736) 
[ 231.341875][ T1483] ? __pfx_ksys_write (fs/read_write.c:726) 
[ 231.341880][ T1483] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 231.341889][ T1483] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 231.341895][ T1483] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  231.341898][ T1483] RIP: 0033:0x7fbe3a9b6baf
[ 231.341906][ T1483] Code: Unable to access opcode bytes at 0x7fbe3a9b6b85.

Code starting with the faulting instruction
===========================================
[  231.341907][ T1483] RSP: 002b:00007fbe39096cd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  231.341911][ T1483] RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 00007fbe3a9b6baf
[  231.341913][ T1483] RDX: 0000000000020000 RSI: 00007fbe3a23a000 RDI: 0000000000000009
[  231.341914][ T1483] RBP: 00007fbe3a23a000 R08: 0000000000000002 R09: 00007fffdf0d9b8f
[  231.341916][ T1483] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000009


Finger prints:
dump_header:oom_kill_process:out_of_memory:__alloc_pages_may_oom:__alloc_frozen_pages_noprof