Re: kern/54908: kernel semi-lock-up

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR kern/54908; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/54908: kernel semi-lock-up
Date: Mon, 3 Feb 2020 21:33:50 +0100

 So I tried with Nick's fix and 256 MB kmemsize and this made tests complete
 fine.
 
 I then tried again with a very -current kernel and default kmemsize, trying
 to get a "show pool" from the hung state - but that did not go too well.
 
 Martin
 
 Stopped in pid 0.5 (system) at  netbsd:cpu_Debugger+0x4:        bx      r14
 db{0}> set $lines=0
 $lines          18 = 0
 db{0}> show pool
 POOL CACHE 4: size 2149122282, align 230727905, ioff 14167529, roflags 0x8008329
 4
         alloc 0x8008325c
         minitems 78662882, minpages 251678947, maxpages 15835031, npages 7885293
 86
         itemsperpage 2148020780, nitems 2148020796, nout 2148020804, hardlimit 2
 148020812
         nget 11050472, nfail 671125989, nput 11050472
         npagealloc 738234853, npagefree 11050472, hiwat 805343717, nidle 1105047
 2
 
 [ 22322.2272560] uvm_fault(0x80aea9d8, 14208000, 1) -> e
 [ 22322.2272560] Fatal kernel mode data abort: 'Translation Fault (S)'
 [ 22322.2272560] trapframe: 0x9ba5baf0
 [ 22322.2272560] FSR=00000005, FAR=142085a5, spsr=20060213
 [ 22322.2272560] r0 =00000000, r1 =f0028000, r2 =00000000, r3 =00000000
 [ 22322.2272560] r4 =00000000, r5 =800831a8, r6 =8047d7d4, r7 =00000000
 [ 22322.2272560] r8 =00000000, r9 =142085c5, r10=142083e5, r11=9ba5bb7c
 [ 22322.2272560] r12=142085a5, ssp=9ba5bb40, slr=8047d2c0, pc =80476a98
 
 Faulted in DDB; continuing...
 db{0}>