• Christoph Hellwig's avatar
    block: defer timeouts to a workqueue · 287922eb
    Christoph Hellwig authored
    Timer context is not very useful for drivers to perform any meaningful abort
    action from.  So instead of calling the driver from this useless context
    defer it to a workqueue as soon as possible.
    
    Note that while a delayed_work item would seem the right thing here I didn't
    dare to use it due to the magic in blk_add_timer that pokes deep into timer
    internals.  But maybe this encourages Tejun to add a sensible API for that to
    the workqueue API and we'll all be fine in the end :)
    
    Contains a major update from Keith Bush:
    
    "This patch removes synchronizing the timeout work so that the timer can
     start a freeze on its own queue. The timer enters the queue, so timer
     context can only start a freeze, but not wait for frozen."
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Acked-by: default avatarKeith Busch <keith.busch@intel.com>
    Signed-off-by: default avatarJens Axboe <axboe@fb.com>
    287922eb
blkdev.h 48 KB