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    SubjectRe: bad page state under possibly oom situation
    Hugh Dickins wrote:

    >(I don't know that it makes any difference, but was this particular report
    >from 2.6.9-rc2 or from 2.6.14 or from something else? In both 2.6.9 and
    >2.6.14, flags 0x90 mean PG_slab|PG_dirty.)
    A very odd combination:
    - free_pages_check() ensures that neither PG_slab nor PG_dirty are set
    - prep_new_page() complains that both PG_slab and PG_dirty are set
    - AFAICS slab doesn't set PG_dirty, and noone except slab set PG_slab.

    I don't understand how two wrong bits can end up in page->flags.
    Dipankar, could you modify bad_page() and hexdump +-128 bytes? Perhaps
    someone overwrites random memory. Or change the value of PG_slab to 20
    and check if page->flags remains 0x90.

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      Last update: 2005-11-03 07:45    [W:0.019 / U:1.632 seconds]
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