[Xen-devel] Changeset 8451 causes SMP xen0 crashing on i386

["Li, Xin B" <xin.b.li@xxxxxxxxx>]

Hi Keir, on i386, with SMP enabled xen0, I got:

INIT: version 2.85 booting
(XEN) CPU:    1
(XEN) EIP:    e008:[<ff10cb64>] sedf_do_schedule+0x434/0xc60
(XEN) EFLAGS: 00010002   CONTEXT: hypervisor
(XEN) eax: 00000000   ebx: 00000100   ecx: 0688b636   edx: 0006c73b
(XEN) esi: 00000002   edi: 00000000   ebp: 068f7d71   esp: ffbf9e64
(XEN) cr0: 8005003b   cr3: 3ebee000
(XEN) ds: e010   es: e010   fs: 0000   gs: 0000   ss: e010   cs: e008
(XEN) Xen stack trace from esp=ffbf9e64:
(XEN)    c4b40000 00000004 006a4734 00000000 00000286 00000246 ffffffff
00000000 
(XEN)    21210000 ffbfa980 ffbf9fb4 ff11cd7c 005daf98 21210000 00000001
ff1bf000 
(XEN)    fed13000 20000000 000027ec 000027e7 00000000 ffbfa988 00000000
80000003 
(XEN)    21210000 00000000 ff1bd080 ffbfa988 0688b636 00000100 ffbfa990
ffbfa998 
(XEN)    ffbf9080 0006c73b 00000000 00000001 ffbf9080 0006c73b 00000000
ff1608c0 
(XEN)    ffbf9080 0006c73b 00000000 00000096 7c64ffd3 00000000 ffbf4080
ff174010 
(XEN)    0688b636 00000002 00000000 ff10f097 ffbf9f74 068f7d71 00000002
ffbf5900 
(XEN)    068f7700 00000002 00000002 ff113e57 678dcba0 00000005 0006c178
00000000 
(XEN)    00000080 ff1bd094 00000001 ff1bd080 068f7700 00000002 00000000
00000013 
(XEN)    00000080 00000080 00000080 00000080 00007ff0 48848000 48848000
ff10f912 
(XEN)    00007ff0 48848000 ff1bd080 ff136d86 cf86def0 00000001 00000000
00007ff0 
(XEN)    48848000 48848000 00000000 000d0402 c01188c9 00000061 00000246
cf86dee4 
(XEN)    00000069 0000007b 0000007b 00000000 00000000 00000001 ff1bd080 
(XEN) Xen call trace:
(XEN)    [<ff10cb64>] sedf_do_schedule+0x434/0xc60
(XEN)    [<ff11cd7c>] get_page_type+0xac/0x320
(XEN)    [<ff10f097>] __enter_scheduler+0x87/0x300
(XEN)    [<ff113e57>] reprogram_ac_timer+0x27/0xf0
(XEN)    [<ff10f912>] do_softirq+0x32/0x50
(XEN)    [<ff136d86>] process_softirqs+0x6/0x8
(XEN)    
(XEN) Faulting linear address: 00000020
(XEN) Pagetable walk from 00000020:
(XEN)   L2 = 00000000 55555555 
(XEN) ************************************
(XEN) CPU1 FATAL TRAP 14 (page fault), ERROR_CODE 0002, IN INTERRUPT
CONTEXT.
(XEN) System shutting down -- need manual reset.
(XEN) ************************************

We found reverting changeset 8451make it OK.
-Xin

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