See "mm: extend MREMAP_DONTUNMAP to non-anonymous mappings": https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4609387859f0281951f5e476d9f76d7fb9ab321 Signed-off-by: Alex Henrie <alexhenrie24@xxxxxxxxx> --- man/man2/mremap.2 | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/man/man2/mremap.2 b/man/man2/mremap.2 index 53e0bcf2d..b99ab9492 100644 --- a/man/man2/mremap.2 +++ b/man/man2/mremap.2 @@ -106,7 +106,13 @@ remaps a mapping to a new address but does not unmap the mapping at .IP The .B MREMAP_DONTUNMAP -flag can be used only with private anonymous mappings +flag can only be used with mappings that are not +.BR VM_DONTEXPAND +or +.BR VM_MIXEDMAP . +Before Linux 5.13, the +.B MREMAP_DONTUNMAP +flag could be used only with private anonymous mappings (see the description of .B MAP_PRIVATE and -- 2.47.0
