mmap MAP_PRIVATE on sealed memfd message

[forouher]

Hi,

is such a thing supposed to work? I tested it, but mmap doesn't seem to like it and fails. :(

I'm trying to send a large memfd message to multiple receivers. It would be really cool if these receivers could modify their local messages on a copy-on-write basis.

cheers
Dariush

[gregkh]

Nope, that's not supposed to work, thanks for verifying it works properly :)