The persistent memory “I know what I'm doing” flag

A commenter on the lwn page pointed to http://danluu.com/file-consistency/ which seems like a nice overview of file consistency issues in various os's. It includes links to papers on the subject as well.

I found it pretty interesting, so i figured i'd note it for others.

Also see previous discussion : https://news.ycombinator.com/item?id=10725859

This use-case seems so specialized that it would be better to avoid the flag and assume that they will build their own unikernels. Imagine the performance you could get if, for exmaple, you knew your application is append-only, and that it would always be running on "persistent memory". There is so much cruft and so many trade-offs you could ignore!

That would be a fun project.

I was just reading a paper summary this morning that's relevant to the point about an application working on one filesystem but not another: http://blog.acolyer.org/2016/02/11/fs-not-equal/