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    SubjectRe: still nfs problems [Was: Linux 2.6.37-rc8]
    On Wed, Jan 5, 2011 at 3:06 PM, Trond Myklebust
    <> wrote:
    > Yes. The fix I sent out was a call to invalidate_kernel_vmap_range(),
    > which takes care of invalidating the cache prior to a virtual address
    > read.
    > My question was specifically about the write through the regular kernel
    > mapping: according to Russell and my reading of the cachetlb.txt
    > documentation, flush_dcache_page() is only guaranteed to have an effect
    > on page cache pages.

    I don't think that should ever matter. It's not like the hardware can
    know whether it's a dcache page or not.

    And if the sw implementation cares, it's doing something really odd.
    But who knows - there's a lot of crap out there, and people sometimes
    do really odd things to work around the brokenness of a VIVT cache
    with aliases.


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