bcache: Fix, improve efficiency of closure_sync()

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Eliminates cases where sync can race and fail to complete / get stuck.
Removes many status flags and simplifies entering-and-exiting closure
sleeping behaviors.

[mlyle: fixed conflicts due to changed return behavior in mainline.
extended commit comment, and squashed down two commits that were mostly
contradictory to get to this state.  Changed __set_current_state to
set_current_state per Jens review comment]

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Michael Lyle <mlyle@lyle.org>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

...

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Kent Overstreet 2018-01-08 12:21:25 -08:00 • committed by Jens Axboe

parent b1092c9af9

commit e4bf791937

2 changed files with 46 additions and 60 deletions

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46

drivers/md/bcache/closure.c

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60

drivers/md/bcache/closure.h

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