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    SubjectRe: [EXT4 set 5][PATCH 1/1] expand inode i_extra_isize to support features in larger inode
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    On Fri, 2007-07-13 at 14:47 -0700, Zach Brown wrote:

    > Peter, do you have any interest in seeing how far we can get
    > at tracking lock_page()? I'm not holding my breath, but any little bit
    > would probably help.

    I ran headfirst into the fact the unlock_page() need not be called by
    the same task that did lock_page().

    Esp IO-completion interrupts love to unlock pages they did not lock
    themselves. Not at all sure that is fixable, it seems to be the nature
    of the async structure of the problem :-(



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