Re: [PATCH] mm/gup: Drain batched mlock folio processing before attempting migration

[Will Deacon]

On Mon, Aug 18, 2025 at 02:31:42PM +0100, Will Deacon wrote:
> On Fri, Aug 15, 2025 at 09:14:48PM -0700, Hugh Dickins wrote:
> > I think replace the folio_test_mlocked(folio) part of it by
> > (folio_test_mlocked(folio) && !folio_test_unevictable(folio)).
> > That should reduce the extra calls to a much more reasonable
> > number, while still solving your issue.
> 
> Alas, I fear that the folio may be unevictable by this point (which
> seems to coincide with the readahead fault adding it to the LRU above)
> but I can try it out.

I gave this a spin but I still see failures with this change.

Will