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640 bytes added ,  15:56, 26 February 2015
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Collected on this page is the design notes about supporting userfaultfd in CRIU
 
Collected on this page is the design notes about supporting userfaultfd in CRIU
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== Concepts ==
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* Tasks after restore should have lazy VMAs being backed by userfaultfd, the fd itself should be sent before resume to CRIU daemon and closed
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* Only MAP_PRIVATE | MAP_ANONYMOUS will be supported in the 1st version due to kernel constraints
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* On source side the [[page server]] should be taught to use page-read to send pages out on the destination one
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* Protocol should include out-of-order pages and background pages pushing (sending them before demand from the process)
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* The now dump-only <code>--page-server</code> option should be used for restore action to tell that the memory will be sucked in through page server
    
[[Category:Memory]]
 
[[Category:Memory]]

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