Re: [PATCH v2 01/31] Documentation: document EXPORT_OP_NOLOCKS
Jeff Layton <[email protected]>
| Newsgroups | dev.linux.lists.gfs2,dev.linux.lists.ntfs3,dev.linux.lists.ocfs2-devel,net.sourceforge.lists.linux-f2fs-devel,org.infradead.lists.linux-mtd,org.kernel.vger.ceph-devel,org.kernel.vger.linux-btrfs,org.kernel.vger.linux-cifs,org.kernel.vger.linux-doc,org.kernel.vger.linux-ext4,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel,org.kernel.vger.linux-nfs,org.kernel.vger.linux-nilfs,org.kernel.vger.linux-unionfs,org.kernel.vger.linux-xfs,org.kvack.linux-mm,org.ozlabs.lists.linux-erofs |
|---|---|
| Message-ID | <[email protected]> |
On Mon, 2026-01-19 at 23:44 -0800, Christoph Hellwig wrote: > On Mon, Jan 19, 2026 at 11:26:18AM -0500, Jeff Layton wrote: > > + EXPORT_OP_NOLOCKS - Disable file locking on this filesystem. Some > > + filesystems cannot properly support file locking as implemented by > > + nfsd. A case in point is reexport of NFS itself, which can't be done > > + safely without coordinating the grace period handling. Other clustered > > + and networked filesystems can be problematic here as well. > > I'm not sure this is very useful. It really needs to document what > locking semantics nfs expects, because otherwise no reader will know > if they set this or not. Fair point. I'll see if I can draft something better. Suggestions welcome. -- Jeff Layton <[email protected]>