Re: [PATCH 04/14] bdi: initialize ->ra_pages in bdi_init

[Christoph Hellwig]

On Mon, Jul 20, 2020 at 01:58:22PM +0200, Richard Weinberger wrote:
> 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

What about jffs2 and blk2mtd raw block devices?