Stacktrace on Supermicro with 1TB memory.

[jhaprins]

[ 38.360296] Large kmem_alloc(73728, 0x1000), please file an issue at: https://github.com/openzfs/zfs/issues/new [ 38.379210] CPU: 42 PID: 4365 Comm: systemd-modules Tainted: P OE 6.1.43-flatcar #1 [ 38.391873] Hardware name: Supermicro AS -2124US-TNRP/H12DSU-iN, BIOS 2.1 05/07/2021 [ 38.403356] Call Trace: [ 38.409477] [ 38.415058] dump_stack_lvl+0x44/0x5c [ 38.422406] spl_kmem_zalloc.cold+0x19/0x1e [spl] [ 38.430572] ? 0xffffffffc0e18000 [ 38.437311] init_module+0x57/0x1000 [zzstd] [ 38.445011] ? 0xffffffffc0e18000 [ 38.451700] do_one_initcall+0x46/0x210 [ 38.458894] ? kmalloc_trace+0x26/0x90 [ 38.465972] do_init_module+0x4a/0x1f0 [ 38.473019] __do_sys_init_module+0x17f/0x1b0 [ 38.480655] do_syscall_64+0x3a/0x90 [ 38.487519] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 38.495933] RIP: 0033:0x7fe6774571fe [ 38.502807] Code: 48 8b 0d 05 9c 0c 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 49 89 ca b8 af 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d2 9b 0c 00 f7 d8 64 89 01 48 [ 38.528660] RSP: 002b:00007ffe43b389b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000af [ 38.539727] RAX: ffffffffffffffda RBX: 000055d8c9d01ad0 RCX: 00007fe6774571fe [ 38.550385] RDX: 00007fe677544ae2 RSI: 0000000000788218 RDI: 00007fe674b97010 [ 38.561089] RBP: 00007fe677544ae2 R08: 0000000000000007 R09: 000055d8c9d01d30 [ 38.571609] R10: 0000000000000005 R11: 0000000000000246 R12: 00007fe674b97010 [ 38.582071] R13: 0000000000000000 R14: 000055d8c9d01be0 R15: 0000000000000000 [ 38.592583]

[admnd]

Perhaps similar to https://github.com/openzfs/zfs/issues/13085 ?

[jhaprins]

I can confirm that the system has 255 Cores and this could indeed be very well the same issue as #13085