On Mon, Jul 13, 2020 at 09:46:33AM +0200, Christoph Hellwig wrote: > Failing to invalid the page cache means data in incoherent, which is > a very bad state for the system. Always fall back to buffered I/O > through the page cache if we can't invalidate mappings. Is that the right approach though? I don't have a full picture in my head, but wouldn't we be better off marking these pages as !Uptodate and doing the direct I/O?
