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[Xen-bugs] [Bug 1055] kernel BUG at xen-3.1.0-src/linux-2.6.18-xen/arch/

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Subject: [Xen-bugs] [Bug 1055] kernel BUG at xen-3.1.0-src/linux-2.6.18-xen/arch/i386/mm/hypervisor.c:185!
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Date: Tue, 1 Apr 2008 12:52:12 -0700
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------- Comment #2 from uli.staerk@xxxxxxxxxxxxxx  2008-04-01 12:52 -------
I just had the same bug using Xen 4.0.1 (4249p). XenCenter reported: 
VM didn't acknowledge the need to shutdown.

In the console I can see the error message right before the kernel crashed:
Bad page state in process 'xe-update-guest'
page:c1128e60 flags:0x00000014 mapping:00000000 mapcount:-1 count:0
Trying to fix it up, but a reboot is needed
 [<c0105208>] show_trace+0xd/0x10
 [<c01056fc>] dump_stack+0x19/0x1b
 [<c013fe3a>] bad_page+0x44/0x6e
 [<c0140644>] get_page_from_freelist+0x23c/0x3c0
 [<c0140817>] __alloc_pages+0x4f/0x261
 [<c010f0b3>] pte_alloc_one+0x14/0x2d
 [<c014847e>] __pte_alloc+0x16/0x2a9
 [<c014b318>] copy_page_range+0x348/0x75c
 [<c0118f35>] copy_process+0xae9/0x11c9
 [<c01198aa>] do_fork+0x8d/0x173
 [<c0102c2b>] sys_clone+0x25/0x2a
 [<c0104bd7>] syscall_call+0x7/0xb

So this is not limited to Xen 3.x, but also 4.x. The VM was based upon the "Xen
Debian Etch 4.0" Template.

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