Re: [PATCH v3 03/16] index-helper: new daemon for caching index and related stuff

Duy Nguyen [off-list ref] writes:

We don't hold this memory forever though. If the daemon is idle for a
while, it exits, releasing memory back to system. And not using
mlock() already gives the OS more freedom in memory usage.

Yup, that is why I suspected you wanted to use something other than
mlock().