Re: [Xen-devel] Reducing impact of save/restore/dump on Dom0

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Ian Pratt wrote:
> As for making the IO bypass the buffer cache, I'm not sure what the best
> way to do this is. There are some occasions where we want the restore
> image to be in the buffer cache (e.g. as used by the fault injection
> testing for fast domain restart) but I agree that its not helpful in the
> normal case. My first inclination would be O_DIRECT, but there may be a
> better way.
O_DIRECT is strongly deprecated.  fadvise(..., FADV_DONTNEED, ...) is
the preferred interface.

    J


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