On Thu, May 16, 2024 at 3:19 PM Gao Xiang <hsiangkao@xxxxxxxxxxxxxxxxx> wrote: > > > > On 2024/5/16 08:25, Barry Song wrote: > > 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) > > Side note: I will offically support large folios of compressed files > upstream in the upcoming one or two cycle, it's almost okay in the current > codebase. Thanks for passing along this fantastic news! Feel free to reach me when you send the patchset. I'm eager to delve into the code and run some tests. > > I have to do more tests to ensure it doesn't break anything... > > Thanks, > Gao Xiang > > > 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
