- Subject: Re: [PATCH 0/4] Export offsets of VMCS fields as note information for kdump
- From: Avi Kivity <avi@xxxxxxxxxx>
- Date: Thu, 19 Apr 2012 14:31:56 +0300
- Cc: zhangyanfei@xxxxxxxxxxxxxx, mtosatti@xxxxxxxxxx, ebiederm@xxxxxxxxxxxx, luto@xxxxxxx, joerg.roedel@xxxxxxx, dzickus@xxxxxxxxxx, paul.gortmaker@xxxxxxxxxxxxx, gregkh@xxxxxxx, ludwig.nussel@xxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, kexec@xxxxxxxxxxxxxxxxxxx
- In-reply-to: <20120419.202707.276752866.d.hatayama@jp.fujitsu.com>
- References: <4F8EABF7.805@redhat.com> <20120419.193640.59653378.d.hatayama@jp.fujitsu.com> <4F8FEC22.400@redhat.com> <20120419.202707.276752866.d.hatayama@jp.fujitsu.com>
- User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120329 Thunderbird/11.0.1
On 04/19/2012 02:27 PM, HATAYAMA Daisuke wrote:
> >> The reason why we want to retrieve guest machine's memory image as
> >> crash dump is that then we can debug guest machine's status using
> >> symbolic debugger such as gdb and crash utility.
> >>
> >> This is very useful. Please consider the situation where engineers are
> >> forced to look into guest machine's memory image through qemu-kvm's
> >> process core dump using gdb without any symbolic information. It's
> >> very inefficient.
> >
> > I still don't follow. If qemu crashed, the values in guest registers
> > are irrelevant. In what way can the help debug the qemu crash?
> >
>
> It would be not helpful for the qemu crash case you are concerned
> about. We want to use the guest state data to look into guest
> machine's image in the crasshed qemu.
Why?
--
error compiling committee.c: too many arguments to function
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