Messages in this thread |  | | Date | Thu, 14 Sep 2000 15:06:57 -0500 | From | Jeff Epler <> | Subject | Re: NFS locking bug -- limited mtime resolution means nfs_lock() does not provide coherency guarantee |
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Jeff Epler <jepler@inetnebr.com> writes: > > > Is there a solution that would allow the kind of guarantee our > > > software wants with non-linux nfsds without the cache-blowing > > > that the change I'm suggesting causes?
Trond: > > As you can see, the idea is to look at whether or not the file has > > changed recently (I arbitrarily chose a full minute as a concession > > towards clusters with lousy clock synchronization). If it has, then > > the page cache is zapped. If not, we force ordinary attribute cache > > consistency checking.
On Thu, Sep 14, 2000 at 09:48:50AM -0700, Michael Eisler wrote: > The fix still does not provide coherency guarantees in all situations, and > at minimum, there ought to be a way to force the client provide a coherency > guarantee.
I agree.
I wish that the way to force the guarantee was through fcntl(F_???LK), but we'll take whatever way we can get.
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