[$] Many more words on volatile ranges

<p> John Stultz continues to push the volatile ranges feature toward the
kernel mainline. Volatile ranges allow web browsers and similar
applications that cache large amounts of data to advise the kernel that the
pages containing that data can be discarded if the system is under memory
pressure. John's latest iteration of the patches is accompanied by a
lengthy description of the current state of the implementation, open
questions, and recent changes to the user-space API. The ensuing
conversation prompted Minchan Kim to propose a patch set of his own that
supports a similar feature for anonymous mappings, with a different use
case in mind.

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Click below (subscribers only) for a full report on both approaches.