io_uring: return locked and pinned page accounting

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Locked and pinned memory accounting in io_{,un}account_mem() depends on
having ->sqo_mm, which is NULL after a recent change for non SQPOLL'ed
io_ring. That disables the accounting.

Return ->sqo_mm initialisation back, and do __io_sq_thread_acquire_mm()
based on IORING_SETUP_SQPOLL flag.

Fixes: 8eb06d7e8d ("io_uring: fix missing ->mm on exit")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2020-07-18 11:31:21 +03:00 • committed by Jens Axboe

parent 5dbcad51f7

commit cbcf72148d

1 changed files with 5 additions and 4 deletions

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fs/io_uring.c

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