On Mon, Mar 10, 2025 at 3:20 PM Martin Pieuchot <mpi@grenadille.net> wrote:

> Hello David,
>
> On 19/02/25(Wed) 21:11, David Higgs wrote:
> > Is it possible that VMMAP_DEBUG is never enabled?  I think I found a
> > bug in vmspace_validate that panics because it ignores anon mmap pages
> > rather than counting them.
>
> VMMAP_DEBUG is indeed only enabled by people that hack on the code.
>
> I applied your diff, which fix the first panic, and now I get the
> following,
>  did you see it as well?  Do you have a fix?


My project is very rudimentary and does not emulate the reaper or the
kernel map. Unfortunately, I have not seen this (yet).

panic: uvm_tree_sanity 0xfffffd800780a720 (/sys/uvm/uvm_map.c 2504):
> (iter->ety
> pe & UVM_ET_FREEMAPPED) == 0
> Stopped at      db_enter+0x14:  popq    %rbp
>     TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
> *381413  34081      0     0x14000      0x200    0  reaper
> db_enter() at db_enter+0x14
> panic(ffffffff81d9b559) at panic+0xdd
> uvm_tree_sanity(fffffd800780a720,ffffffff81d1062e,9c8) at
> uvm_tree_sanity+0x428
>
> vm_map_unlock_ln(fffffd800780a720,ffffffff81d1062e,9c8) at
> vm_map_unlock_ln+0x4
> 5
> uvm_map_teardown(fffffd800780a720) at uvm_map_teardown+0x231
> uvmspace_free(fffffd800780a720) at uvmspace_free+0x5b
> reaper(ffff8000fffff480) at reaper+0x198
>
>
>