hints for pae enabled dom0

[Scott Parish <srparish@us.ibm.com>]

I haven't been making much progress on cracking this one and am
interested in collecting suggestions.

The xen/linux26 pair are yesterday's xen-unstable with Gerd's 6th
pae patches, and pae/highmem enabled.

sRp

--

<snip>    ( for full output: http://srparish.net/tmp/xen-87 )

INIT: Entering runlevel: 2
Starting system log daemon: syslogd.
Starting kernel log daemon: klogd
(XEN) __copy_from_user_ll(0xff107f38, 0xfd8aaaa8, 0x8);
(XEN) lpt_start: 0xfd800000, lpt_end: 0xfe000000
(XEN) (file=traps.c, line=342) Page fault: ff1548a6 -> ff156d71, addr = fd8aaaa8
(XEN) CPU:    0
(XEN) EIP:    0808:[<ff1548a6>]      
(XEN) EFLAGS: 00010246   CONTEXT: hypervisor
(XEN) eax: 00000000   ebx: 00000008   ecx: 00000002   edx: 00000000
(XEN) esi: fd8aaaa8   edi: ff107f38   ebp: ff107ef0   esp: ff107ec8
(XEN) ds: 0810   es: 0810   fs: 0810   gs: 0810   ss: 0810   cs: 0808
(XEN) Stack trace from ESP=ff107ec8:
(XEN)    ff16cf84 fd800000 fe000000 00000008 1007c061 00000000 000113cf ffbf8080 
(XEN)    00000000 15555000 ff107f50 [ff12fbb5] ff107f38 fd8aaaa8 00000008 1007c061 
(XEN)    00000000 ff16f600 00000000 ffbf9800 00000120 00000001 00000292 00000000 
(XEN)    00000008 fd8aaaa8 ff107f38 ffbf9800 1007c061 00000000 41848061 ffbf8080 
(XEN)    00000000 15555000 ff107fb0 [ff134784] fd8aaaa8 41848061 00000000 41848061 
(XEN)    00010076 f0000001 00000000 ffbf8080 00000000 00000000 00000000 00000001 
(XEN)    00000000 00000000 f699d7f0 000113aa 000113aa 00000000 ffbf9800 ffbf8080 
(XEN)    41848061 00000000 41848061 [ff151b33] 15555000 41848061 00000000 00000000 
(XEN)    15555000 41848061 0000000e 000e0003 c0115c8a 00000061 00000282 cfbdfd80 
(XEN)    00000069 0000007b 0000007b 00000000 00000000 ffbf8080 
(XEN) Call Trace from ESP=ff107ec8:
(XEN)    [<ff12fbb5>] [<ff134784>] [<ff151b33>] 
(XEN) Pagetable walk from fd8aaaa8:
(XEN)  L3 = 0x0000000000105001
(XEN)  L2 = 0x000000000010a063 
(XEN)  L1 = 0xfd8085c7fffffd7c
Failed update VA mapping: 15555000, (0x80000c07) 41848061, 00000000
kernel BUG at include/asm-xen/asm/hypercall.h:405 (HYPERVISOR_update_va_mapping)!
 [<c0115cdf>] mm_walk+0x229/0x27f
 [<c0115d91>] mm_pin+0x5c/0x171
 [<c016b32c>] exec_mmap+0x14d/0x1fa
 [<c015f0ef>] dentry_open+0xd2/0x266
 [<c0133de8>] autoremove_wake_function+0x0/0x57
 [<c016b58a>] flush_old_exec+0x11f/0x9ea
 [<c015fddb>] vfs_read+0xc5/0x14d
 [<c016b1d0>] kernel_read+0x50/0x5f
 [<c018b48e>] load_elf_binary+0x3ad/0xcc4
 [<c018b0e1>] load_elf_binary+0x0/0xcc4
 [<c016c137>] search_binary_handler+0xbb/0x2ea
 [<c016c4e6>] do_execve+0x180/0x1fa
 [<c0108385>] sys_execve+0x46/0x97
 [<c01098f8>] syscall_call+0x7/0xb
Kernel panic - not syncing: BUG!
 (XEN) Domain 0 shutdown: rebooting machine.

-- 
Scott Parish
Signed-off-by: srparish@us.ibm.com