From: "Lever, Charles" <Charles.Lever@netapp.com>
Subject: RE: async vs. sync
Date: Tue, 16 Nov 2004 10:48:12 -0800
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Cc: "Olaf Kirch" <okir@suse.de>, <nfs@lists.sourceforge.net>
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> ty den 16.11.2004 Klokka 08:15 (-0800) skreiv Lever, Charles:
> > is the effect of the "sync" export option limited to NFSv3=20
> COMMIT, or is
> > it limited to both NFSv3 COMMIT and NFSv3 FILE_SYNC/DATA_SYNC WRITE?
> >=20
> > what are the effects on NFSv4 writes and commits?
>=20
> No! It is clearly not just limited to writes and commits.
>=20
> Look at the code in fs/nfs/vfs.c: there are EX_ISSYNC()=20
> exceptions that
> wrap calls to nfsd_sync_dir() in nfsd*_create(), nfsd_symlink(),
> nfsd_link(), nfsd_rename(), and nfsd_unlink().

ulp.  wow.  this clearly affects all versions of NFS on the Linux
server, then.

i'm just looking for clarification so i can provide a good explanation
in the Linux NFS FAQ about the evils of using "async."  i'll cruise
through the server code.



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