Ta Mike for suggestion.
Using binary snapshot so decided to perform upgrade.
From:OpenBSD 5.2-current (GENERIC.MP) #98: Tue Nov 13 13:18:33 MST 2012
dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC.MP
To:OpenBSD 5.2-current (GENERIC.MP) #104: Sat Nov 17 13:36:20 MST 2012
dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC.MP
It seems to have resolved the issue, no page faults reported, multiple
removal and insertion of usb device seems to hold it's own.
Will try and get a chance to diff db_access.c
Ta for suggestions.
M
On 11/16/12 18:52, Mike Belopuhov wrote:
On Fri, Nov 16, 2012 at 18:44 +0000,sbienddr...@googlemail.com wrote:
As requested.
ddb{0}> uvm_fault(0xd0a50760, 0x0, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at db_read_bytes+0x14: movzbl 0(%esi,%ecx,1),%eax
ddb{0}> ddb{0}> db_read_bytes(0,1,f58ded94,0,2) at db_read_bytes+0x14
db_get_value(0,1,0,0,f58dee84) at db_get_value+0x2e
db_disasm(0,0,d03fa3f0,0,f58def10) at db_disasm+0x31
db_print_loc_and_inst(0,f58dee6c,f58dee74,d03b8bdd,d0b0c5c0) at
db_print_loc_and_inst+0x3e
db_trap(6,0,58,0,f58deeb0) at db_trap+0x83
kdb_trap(6,0,f58def10,1,e) at kdb_trap+0x107
trap() at trap+0x2e7
--- trap (number -772428976) ---
Bad frame pointer: 0xd1f59000
0:
ddb{0}> ddb{0}> syncing disks...
could you please obtain the trace once again with the diff below.
Index: sys/ddb/db_access.c
===================================================================
RCS file: /home/cvs/src/sys/ddb/db_access.c,v
retrieving revision 1.10
diff -u -p -r1.10 db_access.c
--- sys/ddb/db_access.c 15 Mar 2007 17:10:22 -0000 1.10
+++ sys/ddb/db_access.c 30 Sep 2011 08:09:15 -0000
@@ -51,6 +51,9 @@ db_get_value(db_addr_t addr, size_t size
db_expr_t value, extend;
int i;
+ if (addr == 0)
+ return (0);
+
#ifdef DIAGNOSTIC
if (size > sizeof data)
size = sizeof data;
