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    SubjectRe: PROBLEM: memory corrupting bug, bisected to 6dda9d55
    On Mon, 18 Oct 2010, Andrew Morton wrote:

    > On Mon, 18 Oct 2010 12:33:31 +0100
    > Mel Gorman <> wrote:
    > > A bit but I still don't know why it would cause corruption. Maybe this is still
    > > a caching issue but the difference in timing between list_add and list_add_tail
    > > is enough to hide the bug. It's also possible there are some registers
    > > ioremapped after the memmap array and reading them is causing some
    > > problem.
    > >
    > > Andrew, what is the right thing to do here? We could flail around looking
    > > for explanations as to why the bug causes a user buffer corruption but never
    > > get an answer or do we go with this patch, preferably before 2.6.36 releases?
    > Well, you've spotted a bug so I'd say we fix it asap.
    > It's a bit of a shame that we lose the only known way of reproducing a
    > different bug, but presumably that will come back and bite someone else
    > one day, and we'll fix it then :(

    I might be completely one off as usual, but this thing reminds me of a
    bug I stared at yesterday night:

    Reporter Cc'ed



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