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xen-devel
Re: [Xen-devel] [PATCH] let XEN depend on PAE
Arnd Hannemann wrote:
This is with 2.6.24.2, but latest-git looks the same:
I also tried with 2.6.23 which crashes instantly, without any output of the
guest.
I'm not too surprised. Non-PAE Xen is a bit of a rarity, and it only
gets tested rarely. Chris Wright did spend some time on it a while ago,
but I don't know that its had any real attention since. I've been
making sure non-PAE compiles, but I've been lax about testing it.
This is the first usermode exec, I guess? The backtrace is a bit odd;
I've never seen a problem in move_page_tables before.
Does "xm dmesg" tell you what Xen is complaining about? You may need to
compile with debug=y in Config.mk.
[ 0.599806] 1 multicall(s) failed: cpu 0
[ 0.599816] call 1/2: op=26 arg=[c1051860] result=0
[ 0.599825] call 2/2: op=14 arg=[bf9c7000] result=-22
[ 0.599841] ------------[ cut here ]------------
[ 0.599851] kernel BUG at arch/x86/xen/multicalls.c:103!
[ 0.599861] invalid opcode: 0000 [#1] SMP
[ 0.599871] Modules linked in:
[ 0.599879]
[ 0.599885] Pid: 1, comm: init Not tainted (2.6.24.2 #6)
[ 0.599895] EIP: 0061:[<c0101b7c>] EFLAGS: 00010202 CPU: 0
[ 0.599910] EIP is at xen_mc_flush+0x19c/0x1b0
[ 0.599919] EAX: 00000000 EBX: c10510a0 ECX: c1051060 EDX: c1051060
[ 0.599930] ESI: 00000002 EDI: 00000001 EBP: c2417c10 ESP: c2417be4
[ 0.599940] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: e021
[ 0.599951] Process init (pid: 1, ti=c2417000 task=c2416ab0 task.ti=c2417000)
[ 0.599960] Stack: c0443c98 00000002 00000002 0000000e bf9c7000 ffffffea
c1051060 00000200
[ 0.599984] 00000067 c193fffc bf9c7000 c2417c18 c0101112 c2417c5c
c0166dfc c193ce40
[ 0.600006] c193e5c0 c0000000 c193e5c0 00001000 c0000000 c193ce40
c198e71c c10331cc
[ 0.600029] Call Trace:
[ 0.600036] [<c0107a6a>] show_trace_log_lvl+0x1a/0x30
[ 0.600050] [<c0107b29>] show_stack_log_lvl+0xa9/0xd0
[ 0.600062] [<c0107c1a>] show_registers+0xca/0x1e0
[ 0.600074] [<c0107e4a>] die+0x11a/0x250
[ 0.600085] [<c0108003>] do_trap+0x83/0xb0
[ 0.600096] [<c0108318>] do_invalid_op+0x88/0xa0
[ 0.600108] [<c03e89d2>] error_code+0x72/0x80
[ 0.600121] [<c0101112>] xen_leave_lazy+0x12/0x20
[ 0.600134] [<c0166dfc>] move_page_tables+0x27c/0x300
[ 0.600149] [<c0174762>] setup_arg_pages+0x162/0x2a0
[ 0.600162] [<c019cad3>] load_elf_binary+0x3d3/0x1bd0
[ 0.600175] [<c0173f92>] search_binary_handler+0x92/0x200
[ 0.600190] [<c019b1ef>] load_script+0x1bf/0x200
[ 0.600202] [<c0173f92>] search_binary_handler+0x92/0x200
[ 0.600215] [<c0175bab>] do_execve+0x15b/0x180
[ 0.600227] [<c0104a2e>] sys_execve+0x2e/0x80
[ 0.600241] [<c0106342>] syscall_call+0x7/0xb
[ 0.600253] =======================
[ 0.600259] Code: 24 08 89 44 24 0c 89 74 24 04 c7 04 24 98 3c 44 c0 e8 c9 36 02
00 8b 45 ec 83 c3 20 8b 90 00 0b 00 00 39 d6 72 c0 e9 04 ff ff ff <0f> 0b eb fe
0f 0b eb fe 8d b6 00 00 00 00 8d bf 00 00 00 00 55
[ 0.600370] EIP: [<c0101b7c>] xen_mc_flush+0x19c/0x1b0 SS:ESP e021:c2417be4
[ 0.600393] ---[ end trace a686db401f06e173 ]---
[ 0.600403] Kernel panic - not syncing: Attempted to kill init!
full dmesg, config here:
http://lists.xensource.com/archives/html/xen-devel/2008-02/msg00716.html
Best regards,
Arnd Hannemann
J
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