Comment # 2 on bug 1183843 from Martin Wilck

I observe that the kernel crashes with OOM, the kmalloc-192 cache is
ridiculously large:

> [  132.409828] kmalloc-192         15750374KB   15750374KB

The stack looks like this, although I'm unsure if this was actually the thread
that allocated so much memory:

[  132.508968] Kernel panic - not syncing: System is deadlocked on memory
[  132.515495] CPU: 1 PID: 4444 Comm: iscsi_trx Not tainted
5.3.18-lp152.60-default #1 openSUSE Leap 15.2
[  132.524799] Hardware name: FUJITSU PRIMERGY TX100 S3/D3009-A1, BIOS V4.6.4.1
R1.10.0 for D3009-A1x 03/26/2013
[  132.534712] Call Trace:
[  132.537157]  dump_stack+0x66/0x8b
[  132.540469]  panic+0xfe/0x2d7
[  132.543434]  out_of_memory+0x501/0x510
[  132.547180]  __alloc_pages_slowpath+0x9c9/0xd00
[  132.551711]  __alloc_pages_nodemask+0x2c4/0x300
[  132.556241]  new_slab+0x27a/0xaa0
[  132.559552]  ___slab_alloc+0x3d9/0x5b0
[  132.563301]  ? bio_alloc_bioset+0x1e4/0x240
[  132.567485]  ? bio_alloc_bioset+0x1e4/0x240
[  132.571669]  ? __slab_alloc+0x1c/0x30
[  132.575329]  __slab_alloc+0x1c/0x30
[  132.578816]  __kmalloc+0x285/0x2c0
[  132.582218]  bio_alloc_bioset+0x1e4/0x240
[  132.586227]  pscsi_execute_cmd+0x374/0x6e0 [target_core_pscsi]
[  132.592066]  __target_execute_cmd+0x25/0xb0 [target_core_mod]
[  132.597816]  transport_generic_new_cmd+0x15f/0x310 [target_core_mod]
[  132.604172]  transport_handle_cdb_direct+0x34/0x80 [target_core_mod]
[  132.610528]  iscsit_sequence_cmd+0xce/0x1a0 [iscsi_target_mod]
[  132.616365]  iscsit_process_scsi_cmd+0x20/0xb0 [iscsi_target_mod]
[  132.622461]  iscsit_get_rx_pdu+0x684/0x10b0 [iscsi_target_mod]
[  132.628294]  ? wait_for_completion_interruptible+0xbd/0x190
[  132.633868]  ? iscsi_target_tx_thread+0x1f0/0x1f0 [iscsi_target_mod]
[  132.640224]  ? iscsi_target_rx_thread+0xb8/0xf0 [iscsi_target_mod]
[  132.646406]  iscsi_target_rx_thread+0xb8/0xf0 [iscsi_target_mod]
[  132.652410]  kthread+0x10d/0x130
[  132.655635]  ? kthread_park+0xa0/0xa0
[  132.659295]  ret_from_fork+0x1f/0x40
[  132.662874] Kernel Offset: 0x34c00000 from 0xffffffff81000000 (relocation
range: 0xffffffff80000000-0xffffffffbfffffff)