UVM crash in NetBSD/i386 PAE with 32 GB of RAM

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

Hi

Following up on i386 PAE issues: the machine works fine with PAE and
SMP disabled (boot -1) when it has 16 GB of RAM. Attempting to add 
more memory and reach 32 GB causes the unpleasant UVM crash shown 
below. Does it rings a bell for someone:

panic: lock error
cpu0: Begin traceback...
printf_nolog(c0bb0add,c0b7fe0a,c0ad3428,c0b7ee7f,e5ceca28,0,e5f2fa80,e604f000,0,3000)
 at netbsd:printf_nolog
lockdebug_abort(e5ceca28,c0c3e424,c0ad3428,c0b7ee7f,0,ffffffff,ff7b1858,c054e445,c054de04,e5896a80)
 at netbsd:lockdebug_abort+0x2b
rw_abort.clone.1(c054de04,e5896a80,c0be2940,ff7b17fc,c054093e,c0c78b32,c0c79df0,c0c79d70,c0c79e5c,1)
 at netbsd:rw_abort.clone.1+0x32
rw_vector_enter(e5ceca28,0,34,0,4000,1727,ff7b19d8,c0873b6c,e5ceca24,0) at 
netbsd:rw_vector_enter+0x2a0
vm_map_lock_read(e5ceca24,0,1f7,0,0,ffffffff,ffffffff,ff7b18dc,644,c0c7b148) at 
netbsd:vm_map_lock_read+0x1c
uvm_fault_internal(e5ceca24,3000,1,0,c0c43b00,e442857c,0,e5f2fa80,c0cbdcc0,1) 
at netbsd:uvm_fault_internal+0xd8
trap() at netbsd:trap+0x313
--- trap (number 6) ---
pmap_create(e5cec880,3,0,41,e5ceca28,1,ff7b1b4c,e5cec874,e5ce6370,0) at 
netbsd:pmap_create+0x12d
uvmspace_init(e5cec874,0,0,bf800000,e5ce6370,e5ce6008,ff7b1b8c,c0879589,0,bf800000)
 at netbsd:uvmspace_init+0x5d
uvmspace_alloc(0,bf800000,ff7b1b8c,c0798b47,0,1,0,e604f064,e5f3105c,e604f064) 
at netbsd:uvmspace_alloc+0x43
uvmspace_fork(e5ceca24,1,0,e5ce6008,e5ce6008,e5ce6370,ff7b1c5c,c0537d02,e5ce6370,e5ce6008)
 at netbsd:uvmspace_fork+0x29
uvm_proc_fork(e5ce6370,e5ce6008,0,1c,0,0,e5ce4440,c052e7f2,0,e5ce4440) at 
netbsd:uvm_proc_fork+0x1f
fork1(e5f2fa80,0,14,0,0,0,0,ff7b1d1c,0,ff7b1d48) at netbsd:fork1+0x3d2
sys_fork(e5f2fa80,ff7b1cf4,ff7b1d1c,ff7b1cd0,c067d8ac,e4430308,0,2,c067f24b,e544cb10)
 at netbsd:sys_fork+0x50
syscall(ff7b1d48,b3,ab,bf7f001f,bb50001f,bb6a9704,0,bf7fec48,bb6a75bc,0) at 
netbsd:syscall+0xad
cpu0: End traceback...


-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost