Re: [PATCH 1/2] f2fs: register inodes which is able to donate pages

[Christoph Hellwig]

On Thu, Jan 16, 2025 at 05:19:24PM +0000, Jaegeuk Kim wrote:
> > mean a invalidate_inode_pages2_range.  Which is a strange use of the
> > word.  what are the use cases?  Why is this queued up to a thread and
> > not done inline?  Why is this in f2fs and not in common code.
> 
> The idea is let apps register some file ranges for page donation and admin
> recliam such pages all togehter if they expect to see memory pressure soon.
> We can rely on LRU, but this is more user-given trigger. I'm not sure whether
> there's a need in general, hence, wanted to put it in f2fs first to get more
> concrete use-cases beyond this Android case.

Well, that's certainly not a file system feature.  Please build this
as generic infrastucture and send it to the linux-mm list.