UVM Fault

["John R. Shannon" <john%johnrshannon.com@localhost>]

Started happening immediately upon upgrade to 4.99.64:

proxy# uvm_fault(0xcd370af4, 0, 1) -> 0xe
fatal page fault in supervisor mode
trap type 6 code 0 eip c046184e cs 9 eflags 10282 cr2 0 ilevel 0
panic: trap
syncing disks...

(XEN) domain_crash_sync called from entry.S (ff1664de)
(XEN) Domain 1 (vcpu#0) crashed on cpu#0:
(XEN) ----[ Xen-3.1.3  x86_32  debug=n  Not tainted ]----
(XEN) CPU:    0
(XEN) EIP:    0009:[<c0416460>]
(XEN) EFLAGS: 00010282   CONTEXT: guest
(XEN) eax: c05f8000   ebx: ccfa7d00   ecx: 00001003   edx: 00000008
(XEN) esi: c0416f10   edi: cd4112b0   ebp: cd41100c   esp: cd411000
(XEN) cr0: 8005003b   cr4: 000006d0   cr3: ad3ab000   cr2: cd410ffc
(XEN) ds: 0011   es: 0011   fs: 0031   gs: 0011   ss: 0011   cs: 0009
(XEN) Guest stack trace from esp=cd411000:
(XEN)    c0428e16 00000008 c04c2e40 cd41102c c0428dcc 00000006 00000000
cd41105c
(XEN)    c04c2e40 fffffe00 00000000 cd41105c c033af83 00000008 00000001
00000000
(XEN)    c02f5736 ccf943dc 00000000 cd41107c c04c2e40 c04c2e40 00000008
cd41107c
(XEN)    c03659d9 c051786c 00000000 cd41107c c02eeff4 c04f5340 c9df7000
cd41109c
(XEN)    c036a881 00000075 00000000 00000000 00000000 00000000 00000000
cd4111fc
(XEN)    c036b580 00000075 00000005 00000000 00000000 00000000 00000000
00000000
(XEN)    00000000 00000000 00000007 00000000 00000000 00000000 00000000
00000000
(XEN)    00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
(XEN)    00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
(XEN)    0000000f 00000000 00000001 00000000 0000000f 00000000 00000001
00000000
(XEN)    0000000a 00000000 0000000f 00000000 00000000 c0428ebc cd411174
00000009
(XEN)    cd411190 c0428e16 cd411174 c04c2e40 cd411190 c0428e00 00000000
00000006
(XEN)    cd4111c0 cd411238 00000000 00000000 c04afd40 c0431c14 00000008
cd411166
(XEN)    00000000 ccfa7000 00000001 c04f5340 00000704 c04afd41 00001000
00000008
(XEN)    000018dd 00000008 c04c2e40 00000000 00000000 00000000 08000000
cd4111fc
(XEN)    c036a354 cd411108 00000008 00000000 6ff5ae35 00000000 cd4112b0
cd41122c
(XEN)    c036b2ed c04afd40 00000005 00000000 00000000 cd411238 00000000
00000001
(XEN)    ccfa7d00 cd411238 00000008 cd4112ec c04232b5 c04afd40 c04f5340
ccfa7000
(XEN)    00000002 0000000e 001827bf 00000000 cd411280 c04c2e40 c04c2e40
00000008
(XEN)    00000006 c036c597 0000000a 00000005 00000000 ccfa7000 cd32eaf4
c04f5340




NetBSD 4.99.64 DOM0 and DOMU (source pulled 2008-06-08 10:00:02 UTC)
32-bit i386


DOMU runs squid proxy. Repeatable fault occurs on forst web access via
squid. Works if previous 4.99.63 kernel is used in DOMU.

--

John R. Shannon
john%johnrshannon.com@localhost