lkml.org 
[lkml]   [2012]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 0/2 v3] kvm: notify host when guest panicked
    On 03/14/2012 12:26 PM, Wen Congyang wrote:
    > >> If so, is this channel visible to guest userspace? If the channle is visible to guest
    > >> userspace, the program running in userspace may write the same message to the channel.
    > >>
    > >
    > > Surely there's some kind of access control on channels.
    >
    > The virtio-serial depends on more things than touching the hypervisor. So I think touching
    > the hypervisor is more reliable than using virtio-serial device, and it is very simple and
    > easy to use.
    >
    > If we pass something from guest userspace to host, we can use virtio-serial. But If we pass
    > something from guest kernelspace to host, I still prefer to touch the hypervisor.

    There's no argument that it's easier. My concern is different, we're
    adding more and more stuff to the hypervisor because it's easier, which
    bloats it. Every time we do it we add to compatibility and security
    problems.

    The panic notification is *really* simple, so I don't expect it to cause
    a lot of problems. But still, if it's possible not to change the
    hypervisor, we must make an effort in that direction.

    --
    error compiling committee.c: too many arguments to function



    \
     
     \ /
      Last update: 2012-03-14 11:33    [W:0.020 / U:0.388 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site