Subject: port-sparc64/27288: pmap_clear_reference: pseg empty! - kdb breakpoint at 12454c0
To: None <gnats-bugs@gnats.NetBSD.org>
From: S.P.Zeidler <spz@aquila.ipv6.de>
List: netbsd-bugs
Date: 10/18/2004 11:43:15
>Number: 27288
>Category: port-sparc64
>Synopsis: system falls into kdb due to pagedaemon 'assertion'
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: port-sparc64-maintainer
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Mon Oct 18 09:45:01 UTC 2004
>Closed-Date:
>Last-Modified:
>Originator: S.P.Zeidler
>Release: NetBSD 2.99.10 (Oct 15)
>Organization:
dis-
>Environment:
System: NetBSD aquila 2.99.10 NetBSD 2.99.10 (AQUILA) #2: Fri Oct 15 22:57:08 CEST 2004 spz@aquila:/sys/arch/sparc64/compile/AQUILA sparc64
Architecture: sparc64
Machine: sparc64
>Description:
Debugger() gets called at sys/arch/sparc64/sparc64/pmap.c line 2666.
The condition that calls the Debugger reads
if (pseg_set(pmap, va, data, 0)) {
and it's unclear why that isn't
if (pseg_set(pmap, va, data, 0) & 1) {
Some more documentation (aka comments) would be dandy :-)
Just in case that really should be a comparison against 0:
login: pmap_clear_reference: pseg empty!
kdb breakpoint at 12454c0
Stopped in pid 7.1 (pagedaemon) at netbsd:cpu_Debugger+0x4: nop
db> trace
uvmpd_scan_inactive(18ada90, 1317800, 12ef800, 1, 0, 0) at netbsd:uvmpd_scan_inactive+0x1c8
uvmpd_scan(0, 204, 0, 0, 18adac0, 1317800) at netbsd:uvmpd_scan+0x54
uvm_pageout(c8cc600, 0, 1c09c68, 41724369, a, 188b000) at netbsd:uvm_pageout+0xe0
proc_trampoline(0, 0, 0, 0, 0, 0) at netbsd:proc_trampoline+0x4
db> ps/l
PID LID S FLAGS STRUCT LWP * UAREA * WAIT
24302 1 3 0x4 0xd1f0110 0xcbf4000 uvn_fp1
13916 1 3 0x84 0xd1f0010 0xcbc2000 wait
1013 1 3 0x84 0xd1f0510 0xcbf0000 wait
13523 1 3 0x84 0xc8cd700 0xcb8a000 wait
3357 1 3 0x84 0xc8cca00 0xcb98000 wait
2188 1 3 0x84 0xc8cd800 0xd5f4000 wait
12028 1 3 0x84 0xc8cda00 0xcc08000 wait
29495 1 3 0x84 0xc8cd900 0xcd06000 wait
1439 1 3 0x84 0xc8cd000 0xcd0a000 wait
3818 1 3 0x80 0xc8cd100 0xd50c000 wait
27640 1 3 0x84 0xd1f1710 0xc91e000 select
28621 1 3 0x84 0xd1f0410 0xcb94000 pause
28901 1 3 0x80 0xd1f0a10 0xcb84000 pause
2523 1 3 0x80 0xd1f0d10 0xd180000 select
19491 1 3 0x80 0xd1f0310 0xcd00000 netio
13183 1 3 0x80 0xd1f0910 0xcb34000 ttyin
424 1 3 0x80 0xc8ccc00 0xd644000 wait
9175 1 3 0x80 0xc8cd200 0xd762000 wait
598 1 3 0x84 0xd1f0610 0xd28e000 kqread
556 1 3 0x80 0xc8cde00 0xd1e4000 wait
103 1 3 0x80 0xc8cdd00 0xd1d6000 pause
96 1 3 0x80 0xc8cdc00 0xd1bc000 pause
542 1 3 0x84 0xc8cdb00 0xd1b4000 select
459 1 3 0x80 0xc8cc900 0xc918000 ttyin
438 1 3 0x80 0xc8cd300 0xd146000 select
379 1 3 0x80 0xc8cd600 0xd16c000 select
429 1 3 0x80 0xc8cd500 0xd166000 nanosleep
408 1 3 0x80 0xc8cd400 0xd160000 kqread
398 1 3 0x84 0xc8cce00 0xcaf8000 select
368 1 3 0x80 0xc8ccf00 0xcafe000 select
307 1 3 0x80 0xc8ccb00 0xc92c000 netcon
210 1 2 0x80 0xc8ccd00 0xcaec000
9 1 3 0x4 0xc8cc800 0xc8f2000 aiodoned
8 1 2 0x404 0xc8cc700 0xc8ee000
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
>7 > 1 7 0x4 0xc8cc600 0xc8ea000
6 1 2 0x4 0xc8cc500 0xc8e2000
5 1 3 0x4 0xc8cc400 0xc8de000 rfwcond
4 1 3 0x4 0xc8cc300 0xc8d6000 sccomp
3 1 3 0x4 0xc8cc200 0xc8d2000 smtaskq
2 1 3 0x4 0xc8cc100 0xc8ce000 crypto_wait
1 1 3 0x80 0xc8cc000 0xc8b8000 wait
0 1 2 0x4 0x18a6760 0x1c02000
22514