[openib-general] [PATCH 3/7] IB/ipath - performance improvements via mmap of queues

Roland Dreier rdreier at cisco.com
Wed Aug 23 15:04:01 PDT 2006


    Ralph> Not quite. If the kernel driver is old, libipathverbs is
    Ralph> using the old functions which make system calls instead of
    Ralph> doing the newer mmap stuff. libipathverbs doesn't need to
    Ralph> attempt calling mmap() if it knows the driver doesn't
    Ralph> support it.

You lost me -- I only see one version of ipath_resize_cq(), and it
seems to do munmap()/mmap() without testing an ABI version.

 - R.




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