I think what Andrea is saying is that mmap()-based memory allocation just
grabs a pte without allocating any memory, so swap overcommit isn't relevant
at that time. (It becomes relevant when the process writes to that memory,
triggering a COW, which as you noted *does* involve swap overcommit.)
-- brandon s. allbery [os/2][linux][solaris][japh] allbery@kf8nh.apk.net system administrator [WAY too many hats] allbery@ece.cmu.edu electrical and computer engineering KF8NH carnegie mellon university
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