* Brian Geffon: > When remapping an anonymous, private mapping, if MREMAP_DONTUNMAP is > set, the source mapping will not be removed. Instead it will be > cleared as if a brand new anonymous, private mapping had been created > atomically as part of the mremap() call. If a userfaultfd was watching > the source, it will continue to watch the new mapping. For a mapping > that is shared or not anonymous, MREMAP_DONTUNMAP will cause the > mremap() call to fail. MREMAP_DONTUNMAP implies that MREMAP_FIXED is > also used. The final result is two equally sized VMAs where the > destination contains the PTEs of the source. What will be the protection flags of the source mapping? Will they remain unchanged? Or PROT_NONE? Thanks, Florian
