Re: [dm-devel] [PATCH 4/5] dax: remove the copy_from_iter and copy_to_iter methods

2021-12-10 Thread Vivek Goyal
On Thu, Dec 09, 2021 at 07:38:27AM +0100, Christoph Hellwig wrote: > These methods indirect the actual DAX read/write path. In the end pmem > uses magic flush and mc safe variants and fuse and dcssblk use plain ones > while device mapper picks redirects to the underlying device. > > Add set_dax_v

Re: [PATCH 5/5] dax: always use _copy_mc_to_iter in dax_copy_to_iter

2021-12-10 Thread Vivek Goyal
On Thu, Dec 09, 2021 at 07:38:28AM +0100, Christoph Hellwig wrote: > While using the MC-safe copy routines is rather pointless on a virtual device > like virtiofs, I was wondering about that. Is it completely pointless. Typically we are just mapping host page cache into qemu address space. That s