JuliaLang/julia — pull request #7242 by tkelman (2014-06-13 09:21:46+00:00)
Title: Fix mmap with offset on Windows

query allocation granularity (64k on Windows, larger than page size which is 4k),
ensure offset to MapViewOfFile is a multiple of the granularity

add a test for mmap with offset

fixes #7080 and #6203

some mmap issues remain with HDF5.jl, but there may be something else going on there