Hi Christoph, On Tue, Sep 03, 2019 at 08:37:04AM -0700, Christoph Hellwig wrote: > On Tue, Sep 03, 2019 at 04:17:49PM +0800, Gao Xiang wrote: > > I implement a prelimitary version, but I have no idea it is a really > > cleanup for now. > > The fact that this has to guess the block device address_space > implementation is indeed pretty ugly. I'd much prefer to just use > read_cache_page_gfp, and live with the fact that this allocates > bufferheads behind you for now. I'll try to speed up my attempts to > get rid of the buffer heads on the block device mapping instead. Fully agree with your point. Let me use read_cache_page_gfp instead for now, hoping block device quickly avoiding from buffer_heads... Thanks, Gao Xiang
