On 02/29/2012 03:29 AM, Wen Congyang wrote: > At 02/28/2012 07:23 PM, Avi Kivity Wrote: > > On 02/27/2012 05:01 AM, Wen Congyang wrote: > >> We can know the guest is paniced when the guest runs on xen. > >> But we do not have such feature on kvm. This patch implemnts > >> this feature, and the implementation is the same as xen: > >> register panic notifier, and call hypercall when the guest > >> is paniced. > > > > What's the motivation for this? "Xen does this" is insufficient. > > Another purpose is: management app(for example: libvirt) can do auto > dump when the guest is crashed. If management app does not do auto > dump, the guest's user can do dump by hand if he sees the guest is > paniced. > > I am thinking about another status: dumping. This status tells > the guest's user that the guest is paniced, and the OS's dump function > is working. > > These two status can tell the guest's user whether the guest is pancied, > and what should he do if the guest is paniced. >
How about using a virtio-serial channel for this? You can transfer any amount of information (including the dump itself). -- error compiling committee.c: too many arguments to function
