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    SubjectRe: [PATCH] remove hugetlb_instantiation_mutex
    On Mon, 2007-07-30 at 15:15 +0800, Zhang, Yanmin wrote:
    > On Fri, 2007-07-27 at 11:37 -0500, Adam Litke wrote:
    > > Hey... I am amazed at how quickly you came back with a patch for this :)
    > > Thanks for looking at it. Unfortunately there is one show-stopper and I
    > > have some reservations (pun definitely intended) with your approach:
    > Thanks for your great comments.

    Sorry for such a long delay in responding. I have been pretty busy

    > > First, your patch does not pass the libhugetlbfs test
    > > 'alloc-instantiate-race' which was written to tickle the the race which
    > > the mutex was introduced to solve. Your patch works for shared
    > > mappings, but not for the private case.
    > My testing about private might not be thorough. Function hugetlb_cow has a race
    > for multi-thread to fault on the same private page index. But after I fixed it,
    > alloc-instantiate-race still failed.
    > I tried to google the source code tarball of libhugetlbfs test suite, but couldn't
    > find it. Would you like to send me a copy of the test source codes?

    The tarball will contain a test called alloc-instantiate-race. Make
    sure to run it in private and shared mode. Let me know what you find

    Adam Litke - (agl at
    IBM Linux Technology Center

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      Last update: 2007-08-03 18:42    [W:0.020 / U:53.768 seconds]
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