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    GFS2: Umount recovery race fix · fe64d517
    Steven Whitehouse 提交于
    This patch fixes a race condition where we can receive recovery
    requests part way through processing a umount. This was causing
    problems since the recovery thread had already gone away.
    
    Looking in more detail at the recovery code, it was really trying
    to implement a slight variation on a work queue, and that happens to
    align nicely with the recently introduced slow-work subsystem. As a
    result I've updated the code to use slow-work, rather than its own home
    grown variety of work queue.
    
    When using the wait_on_bit() function, I noticed that the wait function
    that was supplied as an argument was appearing in the WCHAN field, so
    I've updated the function names in order to produce more meaningful
    output.
    Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
    fe64d517
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