On 3/3/25 17:15, Vlastimil Babka wrote: > On 3/3/25 16:48, Matthew Wilcox wrote: >> You need to turn on the debugging options Vlastimil mentioned and try to >> figure out what nvme is doing wrong. > > Agree, looks like some error path going wrong? > Since there seems to be actual non-large kmalloc usage involved, another > debug parameter that could help: CONFIG_SLUB_DEBUG=y, and boot with > "slab_debug=FZPU,kmalloc-*" Also make sure you have CONFIG_DEBUG_VM please.