Hello Chrstoph, On Mon, Jul 20, 2020 at 9:53 AM Christoph Hellwig <hch@xxxxxx> wrote: > > Set up a readahead size by default. This changes behavior for mtd, > ubifs, and vboxsf to actually enabled readahead, the lack of which > very much looks like an oversight. UBIFS doesn't enable readahead on purpose, please see: http://www.linux-mtd.infradead.org/doc/ubifs.html#L_readahead -- Thanks, //richard