Avi Kivity wrote: > Chris Wright wrote: >> * Izik Eidus ([EMAIL PROTECTED]) wrote: >> >>> this module find this identical data (pages) and merge them into one >>> single page >>> this new page is write protected so in any case the guest will try >>> to write to it do_wp_page will duplicate the page >>> >> >> What happens if you've merged more pages than you can recover on write >> faults? >> > > You start to swap. Just like Linux when you start to write on > fork()ed memory. > > A management application may start taking measures, like inflating > balloons and migrating to other hosts, but swapping is needed as a > last resort measure. > yes, write faults are getting into do_wp_page() that in turn create a new anonymous/swappable page so it is safe.
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