[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Swapping of PT pages
On 20/02/2008, Mike Sun <msun@xxxxxxxxxx> wrote: > Hi -- > > In examining the domain save/migration code (xc_domain_save.c), I came > across the step in which page table page frames in memory are > canonicalized so that mfns are translated to pfns before those pages > are written out to the saved image/destination host. This makes me > wonder if a PV host is allowed to swap out page table pages if it so I suspect Xen translates the mfns of the PV guests PT pages to equivalent pfns before they can be actually swapped out on to a physical disk. May be I am wrong i guess as i do not have the source handy at the moment. Please CMIIW. Thanks, > decided; if swapping of PT pages were allowed, then wouldn't certain > page table pages not be canonicalized (since they would be on disk, > not in any of the machine frames). This obviously be bad. > > Am I understanding things incorrectly? > > Thanks, > Mike > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel > -- Pradeep Singh Rautela http://eagain.wordpress.com http://emptydomain.googlepages.com _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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