On Sun, Oct 14, 2007 at 07:46:31AM +0200, Alon Bar-Lev wrote:
> On 10/14/07, Michael Halcrow <[EMAIL PROTECTED]> wrote:
> > On Sun, Oct 14, 2007 at 01:52:05AM +0200, Alon Bar-Lev wrote:
> > > Just a minor question...
> > > Why not implement eCryptfs as fuse?
> >
> > 1. No shared memory mappings.
> 
> Are you thinking users will execute libraries from eCrypfs?

Absolutely. I know of users who are mounting their entire root under
eCryptfs.

> >
> > 2. Extra context switching between kernel and userspace on every page
> > read/write syscall.
> 
> But decryption is slow anyway... :)

Not always. Architectures like the s390 with CPACF instructions can do
the symmetric encryption very quickly; the extra constant context
switching would result in a significant performance degredation.

Mike

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