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    SubjectRe: Call trace at mm/page-writeback.c in 2.5.47
    Mark Haverkamp wrote:
    >
    > While running a memory stress workload test on a 16 processor numa
    > system, I received a number of call traces like the following:

    What is the workload? And in which journalling mode was ext3
    being used?

    Was the workload actually being run against ext3?

    > buffer layer error at mm/page-writeback.c:559
    > Pass this trace through ksymoops for reporting
    > Call Trace:
    > [<c013f1fb>] __set_page_dirty_buffers+0x3b/0x150
    > [<c012d746>] zap_pte_range+0x1d6/0x2c0
    > [<c0183401>] do_get_write_access+0x4a1/0x4d0
    > [<c012d89c>] zap_pmd_range+0x6c/0x80

    A non-uptodate page mapped into pagetables. I _think_ I
    can see how that can happen. If the workload was, say,
    bash-shared-mapping...

    If it is reproducible, does the removal of the ClearPageUptodate
    statement from mm/truncate.c:truncate_complete_page() make it
    go away?

    Thanks.
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