Learn Backend Development Part-Time, Online
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This session explains QEMU postcopy preemption, a feature for speeding page-request handling during live migration. It covers how postcopy works, how preemption can reduce page-fault latency, and possible enhancements for huge pages.
Syllabus
OUTLINES
WHAT IS POSTCOPY?
WHAT IS POSTCOPY PREEMPTION?
LIVE MIGRATION (PRECOPY)
POSTCOPY LIMITATIONS
BACKGROUND PAGE FLUSH
CHANNEL SEPARATION
HUGE PAGE GRANULE
HUGE PAGE PREEMPTIONS
MIGRATION THREAD ITSELF!
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PERFORMANCE NUMBERS
DISTRIBUTIONS OF LATENCIES
Taught by
Linux Foundation