Hi Takeshi, On 3/18/25 11:00 AM, Takeshi Nishimura wrote: > Zhang Yi <yi.zhang@xxxxxxxxxx> wrote in linux-fsdevel@xxxxxxxxxxxxxxx: >> Add support for FALLOC_FL_WRITE_ZEROES. This first allocates blocks as >> unwritten, then issues a zero command outside of the running journal >> handle, and finally converts them to a written state. > > Picking up where the NFS4.2 WRITE_SAME discussion stalled: > FALLOC_FL_WRITE_ZEROES is coming, and IMO the only way to implement > that for NFS is via WRITE_SAME. > > How to proceed? I've been working on patches for implementing FALLOC_FL_ZERO_RANGE support in the NFS client using WRITE_SAME. I've also been experimenting with adding an ioctl for the generic pattern writing part. I'm expecting to talk about what I have for ioctl API at LSF next week, and I'll post an initial round of patches shortly after. I do still need to think through any edge cases and write tests for pynfs and fstests before anything can be merged. I hope this helps, Anna
