[Xen-devel] Ephemeral pages - Possible extension

[Kaustubh Kabra <kaustubhwise@xxxxxxxxx>]

Hi Dan,

Yes, we have been thinking of implementing common-page sharing for
multiple guest OSes for Xen. This will be similar to the way KVM
benefits because of the KSM feature in the Linux kernel.

I found your patch for sharing ephemeral pages in the same tmem pool while
searching further on the same topic. As I understand it the ephemeral pages 
are the pages that are read-only, i.e. txt section of executables etc. Is this

understanding correct?

Now that this is in place, I was thinking about extending this further
to all the pages in the Guest OS's memory and use COW for read-write
pages. I have started reading up the tmem architecture document and
also your patch to have a better understanding of the system. Once I
have digested this, I'll come up with a proposal towards the same.

Do you have any thoughts on the concept / anticipated roadblocks ?


Thanks,

-- 
Kaustubh Kabra
http://www.kaustubhwise.000a.biz


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