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    SubjectRe: Distributed storage.
    Date
    On Sunday 05 August 2007 08:01, Evgeniy Polyakov wrote:
    > On Sun, Aug 05, 2007 at 01:06:58AM -0700, Daniel Phillips wrote:
    > > > DST original code worked as device mapper plugin too, but its two
    > > > additional allocations (io and clone) per block request ended up
    > > > for me as a show stopper.
    > >
    > > Ah, sorry, I misread. A show stopper in terms of efficiency, or in
    > > terms of deadlock?
    >
    > At least as in terms of efficiency. Device mapper lives in happy
    > world where memory does not end and allocations are fast.

    Are you saying that things are different for a network block device
    because it needs to do GFP_ATOMIC allocations? If so then that is just
    a misunderstanding. The global page reserve Peter and I use is
    available in interrupt context just like GFP_ATOMIC.

    Regards,

    Daniel
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