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Still Waiting for Swap Prefetch

Aug 06, 2007, 22:30 (3 Talkback[s])
(Other stories by Jonathan Corbet)

"It has been almost two years since LWN covered the swap prefetch patch. This work, done by Con Kolivas, is based on the idea that if a system is idle, and it has pushed user data out to swap, perhaps it should spend a little time speculatively fetching that swapped data back into any free memory that might be sitting around. Then, when some application wants that memory in the future, it will already be available and the time-consuming process of fetching it from disk can be avoided.

"The classic use case for this feature is a desktop system which runs memory-intensive daemons (updatedb, say, or a backup process) during the night..."

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