Re: mmap() page swapping location?

From: Juan J. Quintela (
Date: Wed Aug 02 2000 - 07:11:27 EST

>>>>> "richard" == Richard Guenther <> writes:


richard> You are wrong wrt MAP_PRIVATE semantics. You really need to mmap
richard> MAP_SHARED to get the file updated: [quoting from SUS2]

richard> When the msync() function is called on MAP_PRIVATE mappings, any modified
richard> data will not be written to the underlying object and will not cause such
richard> data to be made visible to other processes. It is unspecified whether data
richard> in MAP_PRIVATE mappings has any permanent storage locations.

I stand corrected. Thanks for the explanation.

Later, Juan.

In theory, practice and theory are the same, but in practice they 
are different -- Larry McVoy

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