Eric Lee / smarc-fsl-linux-kernel

18 Oct, 2010

1 commit

  • d8e042060   xen: define BIOVEC_PHYS_MERGEABLE() ... Browse Code ยป

    Impact: allow Xen control of bio merging

    When running in Xen domain with device access, we need to make sure
    the block subsystem doesn't merge requests across pages which aren't
    machine physically contiguous. To do this, we define our own
    BIOVEC_PHYS_MERGEABLE. When CONFIG_XEN isn't enabled, or we're not
    running in a Xen domain, this has identical behaviour to the normal
    implementation. When running under Xen, we also make sure the
    underlying machine pages are the same or adjacent.

    Signed-off-by: Jeremy Fitzhardinge
    Signed-off-by: Konrad Rzeszutek Wilk

    Jeremy Fitzhardinge