On Mon, Jan 13, 2014 at 7:36 PM, Mel Gorman <mgorman@suse.de> wrote:
> That could be something we look at. There are cases buried deep in the
> VM where pages get shuffled to the end of the LRU and get tagged for
> reclaim as soon as possible. Maybe you need access to something like
> that via posix_fadvise to say "reclaim this page if you need memory but
> leave it resident if there is no memory pressure" or something similar.
> Not exactly sure what that interface would look like or offhand how it
> could be reliably implemented.
I don't see a reason not to make this behavior the default for WONTNEED.
