Messages in this thread | | | From | Trond Myklebust <> | Subject | Re: [RFC PATCH] NFS: Save 4 bytes when re-exporting | Date | Sun, 12 Dec 2021 21:19:59 +0000 |
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On Sun, 2021-12-12 at 22:00 +0100, Richard Weinberger wrote: > When re-exporting, the whole struct nfs_fh is embedded in the new > fhandle. > But we need only nfs_fh->data[], nfs_fh->size is not needed. > So skip fs_fh->size and save a full word (4 bytes). > The downside is the extra memcpy() in nfs_fh_to_dentry(). > > Signed-off-by: Richard Weinberger <richard@nod.at> > --- > While investigating into improving NFS re-export I noticed that > we can already save 4 bytes of overhead. > I don't think we need to embedd the full struct nfs_fh and > can skip ->size. >
NACK. This will break existing running clients. Any code to change the filehandle format must be accompanied with code to detect and service filehandles that are presented in the old format.
-- Trond Myklebust Linux NFS client maintainer, Hammerspace trond.myklebust@hammerspace.com
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