[$] Supporting NFS v4.2 WRITE_SAME

Date:
Mon, 16 Jun 2025 14:25:21 +0000

Description:
At the 2025 Linux Storage, Filesystem, Memory Management, and BPF Summit (LSFMM+BPF), Anna Schumaker led a discussion about implementing the NFS
v4.2 WRITE_SAME command in both the NFS client and server. WRITE_SAME is
meant to write large amounts of identical data (e.g. zeroes) to the server without actually needing to transfer all of it over the wire. In her topic proposal , Schumaker wondered whether other filesystems needed the functionality, so that it should be implemented at the virtual filesystem
(VFS) layer, or whether it should simply be handled as an NFS-specific
ioctl() .

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Link to news story:
https://lwn.net/Articles/1025257/


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