Re: [PATCH v8 5/9] fsdax: Introduce dax_lock_mapping_entry()

2021-12-14 Thread Christoph Hellwig
On Thu, Dec 02, 2021 at 04:48:52PM +0800, Shiyang Ruan wrote: > The current dax_lock_page() locks dax entry by obtaining mapping and > index in page. To support 1-to-N RMAP in NVDIMM, we need a new function > to lock a specific dax entry corresponding to this file's mapping,index. > And BTW,

[PATCH v8 5/9] fsdax: Introduce dax_lock_mapping_entry()

2021-12-02 Thread Shiyang Ruan
The current dax_lock_page() locks dax entry by obtaining mapping and index in page. To support 1-to-N RMAP in NVDIMM, we need a new function to lock a specific dax entry corresponding to this file's mapping,index. And BTW, output the page corresponding to the specific dax entry for caller use.