On Tue, Dec 26, 2017 at 08:15:42PM +0300, Kirill A. Shutemov wrote:
> > 28 files changed, 249 insertions(+), 240 deletions(-)
>
> Everything looks fine to me after quick scan, but hat's a lot of changes for
> one patch...
Yeah. It's pretty mechanical though.
> > - if (radix_tree_exceptional_entry(page)) {
> > + if (xa_is_value(page)) {
> > if (!invalidate_exceptional_entry2(mapping,
> > index, page))
> > ret = -EBUSY;
>
> invalidate_exceptional_entry? Are we going to leave the terminology here as is?
That is a great question. If the page cache wants to call its value
entries exceptional entries, it can continue to do that. I think there's
a better name for them, but I'm not sure what it is. Right now, the
page cache uses value entries to store:
1. Shadow entries (for workingset)
2. Swap entries (for shmem)
3. DAX entries
I can't come up with a good name for these three things. 'nonpage' is
the only thing which hasn't immediately fallen off my ideas list. But
I think renaming exceptional entries in the page cache is a great idea,
and I don't want to do it as part of this patch set ;-)
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