On Thu, May 16, 2024 at 11:41 AM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > > On Fri, May 10, 2024 at 02:22:02PM +1200, Barry Song wrote: > > - The allocation of mTHP isn't consistently reliable; even after > > prolonged use, obtaining large folios > > remains uncertain. > > As an instance, following a few hours of operation, the likelihood > > of successfully allocating large > > folios on a phone may decrease to just 2%. > > I'd be curious to know whether you're using a filesystem that supports > large folios or whether the pagecache is full of small folios? The more > places that allocate large folios, the easier it becomes to allocate > large folios. I am not using file systems with large folios as neither erofs(compressed files) nor f2fs supports large folios. So, yes, the page cache is full of small folios. > > Also, do you have CONFIG_COMPACTION enabled? > Yes. COMPACTION is enabled. Thanks Barry
