Re: [Xen-devel] [PATCH] xen: fix hypervisor crash with xentrace

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> On 06.04.11 at 16:32, Christoph Egger <Christoph.Egger@xxxxxxx> wrote:
> Attached patch fixes hypervisor crashes when xentrace buffer gets 
> initialized.

Just saw that Keir already fixed this the proper way as c/s
23173:94cef9aaf0cd. Thanks, Keir!

Jan

> The xen backtraces I have seen are:
> 
> (XEN) Xen call trace:
> (XEN)    [<ffff82c48025cf70>] early_stack+0x0/0x48
> (XEN)    [<ffff82c4801278d0>] tb_control+0x182/0x278
> (XEN)    [<ffff82c480124aac>] do_sysctl+0x1fc/0xa40
> (XEN)    [<ffff82c480213248>] syscall_enter+0xc8/0x122
> (XEN)
> (XEN) Pagetable walk from ffff82c48025cf70:
> (XEN)  L4[0x105] = 00000000cfcaa027 5555555555555555
> (XEN)  L3[0x112] = 00000000cfcab027 5555555555555555
> (XEN)  L2[0x001] = 000000022f27b063 5555555555555555
> (XEN)  L1[0x05c] = 00000000cfc5c262 5555555555555555
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) FATAL PAGE FAULT
> (XEN) [error_code=0010]
> (XEN) Faulting linear address: ffff82c48025cf70
> (XEN) ****************************************
> 
> 
> (XEN) Xen call trace:
> (XEN)    [<ffff82c48025d852>] notifier_chain_register+0x0/0x35
> (XEN)    [<ffff82c4801275b2>] alloc_trace_bufs+0x5cd/0x7a9
> (XEN)    [<ffff82c480127910>] tb_control+0x182/0x278
> (XEN)    [<ffff82c480124aec>] do_sysctl+0x1fc/0xa40
> (XEN)    [<ffff82c480213288>] syscall_enter+0xc8/0x122
> (XEN)
> (XEN) Pagetable walk from ffff82c48025d852:
> (XEN)  L4[0x105] = 00000000cfcaa027 5555555555555555
> (XEN)  L3[0x112] = 00000000cfcab027 5555555555555555
> (XEN)  L2[0x001] = 000000022f27b063 5555555555555555
> (XEN)  L1[0x05d] = 00000000cfc5d262 5555555555555555
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 1:
> (XEN) FATAL PAGE FAULT
> (XEN) [error_code=0010]
> (XEN) Faulting linear address: ffff82c48025d852
> (XEN) ****************************************
> 
> 
> Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>
> 





_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel