Re: [PATCH v10 00/21] Support ext4 on NV-DIMMs

Andrew Morton
2014-08-27T21:30:58Z

On Wed, 27 Aug 2014 16:22:20 -0500 (CDT) Christoph Lameter <cl@linux.com> wrote:

> > Some explanation of why one would use ext4 instead of, say,
> > suitably-modified ramfs/tmpfs/rd/etc?
>
> The NVDIMM contents survive reboot and therefore ramfs and friends wont
> work with it.

See "suitably modified". Presumably this type of memory would need to
come from a particular page allocator zone. ramfs would be unweildy
due to its use to dentry/inode caches, but rd/etc should be feasible.

I dunno, I'm not proposing implementations - I'm asking obvious
questions. Stuff which should have been addressed in the changelogs
before one even starts to read the code...