lkml.org 
[lkml]   [2014]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RFC PATCH 1/1] Move two pinned pages to non-movable node in kvm.
    On 06/21/2014 04:39 AM, Marcelo Tosatti wrote:
    > On Fri, Jun 20, 2014 at 05:31:46PM -0300, Marcelo Tosatti wrote:
    >>> IIRC your shadow page pinning patch series support flushing of ptes
    >>> by mmu notifier by forcing MMU reload and, as a result, faulting in of
    >>> pinned pages during next entry. Your patch series does not pin pages
    >>> by elevating their page count.
    >>
    >> No but PEBS series does and its required to stop swap-out
    >> of the page.
    >
    > Well actually no because of mmu notifiers.
    >
    > Tang, can you implement mmu notifiers for the other breaker of
    > mem hotplug ?

    Hi Marcelo,

    I made a patch to update ept and apic pages when finding them in the
    next ept violation. And I also updated the APIC_ACCESS_ADDR phys_addr.
    The pages can be migrated, but the guest crached.

    How do I stop guest from access apic pages in mmu_notifier when the
    page migration starts ? Do I need to stop all the vcpus by set vcpu
    state to KVM_MP_STATE_HALTED ? If so, the vcpu will not able to go
    to the next ept violation.

    So, may I write any specific value into APIC_ACCESS_ADDR to stop guest
    from access to apic page ?

    Thanks.


    \
     
     \ /
      Last update: 2014-06-30 04:01    [W:8.114 / U:0.280 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site