io-wq: provide an io_wq_put_and_exit() helper

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If we put the io-wq from io_uring, we really want it to exit. Provide
a helper that does that for us. Couple that with not having the manager
hold a reference to the 'wq' and the normal SQPOLL exit will tear down
the io-wq context appropriate.

On the io-wq side, our wq context is per task, so only the task itself
is manipulating ->manager and hence it's safe to check and clear without
any extra locking. We just need to ensure that the manager task stays
around, in case it exits.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Jens Axboe 2021-02-26 13:48:19 -07:00

parent 8629397e6e

commit afcc4015d1

3 changed files with 21 additions and 11 deletions

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29

fs/io-wq.c

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fs/io-wq.h

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fs/io_uring.c

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