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    SubjectRe: [patch] rewrite rd
    On Tue, Dec 04, 2007 at 10:54:51AM +0100, Christian Borntraeger wrote:
    > Am Dienstag, 4. Dezember 2007 schrieb Nick Piggin:
    > [...]
    > > There is one slight downside -- direct block device access and filesystem
    > > metadata access goes through an extra copy and gets stored in RAM twice.
    > > However, this downside is only slight, because the real buffercache of the
    > > device is now reclaimable (because we're not playing crazy games with it),
    > > so under memory intensive situations, footprint should effectively be the
    > > same -- maybe even a slight advantage to the new driver because it can also
    > > reclaim buffer heads.
    >
    > This is just an idea, I dont know if it is worth the trouble, but have you
    > though about implementing direct_access for brd? That would allow
    > execute-in-place (xip) on brd eliminating the extra copy.

    Actually that's a pretty good idea. It would allow xip to be tested
    without special hardware as well...

    I'll see what the patch looks like. Thanks



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