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Re: [Xen-devel] Re: [Xen-users] Continuing BUG:-iness booting Fedora Raw

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [Xen-users] Continuing BUG:-iness booting Fedora Rawhide 3.1.0-rc's (was Summary: Experiences setting up a debug serial port)
From: Andy Burns <xen.lists@xxxxxxxxxxx>
Date: Wed, 21 Sep 2011 20:43:06 +0100
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On 21 September 2011 19:03, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:

>> [    0.615589] usbcore: registered new interface driver hub
>> [    0.615589] usbcore: registered new device driver usb
>> [    0.615948] PCI: Using ACPI for IRQ routing
>> (XEN) mm.c:4976:d0 Global bit is set to kernel page fffff81b8e
>> (XEN) mm.c:4976:d0 Global bit is set to kernel page fffff81b8e
>> (XEN) mm.c:4976:d0 Global bit is set to kernel page fffff81118
>> (XEN) mm.c:4976:d0 Global bit is set to kernel page fffff81117
>> (XEN) domain_crash_sync called from entry.S
>> (XEN) Domain 0 (vcpu#0) crashed on cpu#0:
>> (XEN) ----[ Xen-4.1.1  x86_64  debug=n  Not tainted ]----
>> (XEN) CPU:    0
>> (XEN) RIP:    e033:[<ffffffff81118d96>]
>> (XEN) RFLAGS: 0000000000010282   EM: 0   CONTEXT: pv guest
>> (XEN) rax: 0000000000000080   rbx: ffff880163985480   rcx: 0000000000000040
>> (XEN) rdx: 0040000000000080   rsi: ffff880163985480   rdi: ffff880163985480
>> (XEN) rbp: ffff880163dfaff0   rsp: ffff880163dfafd0   r8:  0000001373ffffff
>> (XEN) r9:  ffffffff81b8e7fd   r10: 0000ffff00066c0a   r11: 0000000080000000
>> (XEN) r12: ffffffff81a1cbd0   r13: ffffffff81b8e7fd   r14: 0000001000000000
>> (XEN) r15: ffffffff81a1cbd0   cr0: 000000008005003b   cr4: 00000000000026f0
>> (XEN) cr3: 0000000221a05000   cr2: 000000137400002f
>> (XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: e02b   cs: e033
>
> That is fixed in the latest Linus tree. You might need this patch as well:
>    xen/e820: if there is no dom0_mem=, don't tweak extra_pages.

Yep, can confirm that adding a dom0_mem= limit prevents the crash,
will build an -rc6  kernel with both the mutex patch and the don't
tweak extra pages patch later just to double check .

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