Messages in this thread | | | Subject | Re: eCryptfs Design Document | From | Miklos Szeredi <> | Date | Sat, 25 Mar 2006 08:38:53 +0100 |
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> > > One dutifully wonders whether all this functionality could be > > > provided via FUSE... > > > > My main concern with FUSE has to do with shared memory mappings. > > OK. But I'm sure Miklos would appreciate help with that ;)
You bet.
> > My next concern is with regard to performance impact of constant > > context switching during page reads and writes. > > Maybe. One could estimate the cost of that by benchmarking an existing > (efficient) FUSE fs and then add fiddle factors. If the number of copies > is the same for in-kernel versus FUSE then one would expect the performance > to be similar. Especially if the encrypt/decryption cost perponderates.
The main overhead of FUSE is not in copies, but in context switching. For I/O that can be mitigated by doing it in big chunks, otherwise the only solution is adding more processors.
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