[lkml]   [2016]   [Apr]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRE: [PATCH kernel 1/2] mm: add the related functions to build the free page bitmap
> On Tue, 2016-04-19 at 22:34 +0800, Liang Li wrote:
> > The free page bitmap will be sent to QEMU through virtio interface and
> > used for live migration optimization.
> > Drop the cache before building the free page bitmap can get more free
> > pages. Whether dropping the cache is decided by user.
> >
> How do you prevent the guest from using those recently-freed pages for
> something else, between when you build the bitmap and the live migration
> completes?

Because the dirty page logging is enabled before building the bitmap, there is no need
to prevent the guest from using the recently-freed pages ...

 \ /
  Last update: 2016-04-19 17:21    [W:0.080 / U:3.292 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site