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(parent: 7fbb1b5) | patch
io_uring: don't miscount pinned memory
authorPavel Begunkov <asml.silence@gmail.com>
Sat, 18 Jul 2020 08:31:20 +0000 (11:31 +0300)
committerJens Axboe <axboe@kernel.dk>
Fri, 24 Jul 2020 19:00:45 +0000 (13:00 -0600)
commit5dbcad51f78434e782d0470b8b5fc4380700c35f
treeca3f1b1f9be35f84d06e5dcea240740b263235e6tree | snapshot
parent7fbb1b541f4286cc337b9bca1e5bad0ce4ee978ccommit | diff
io_uring: don't miscount pinned memory

io_sqe_buffer_unregister() uses cxt->sqo_mm for memory accounting, but
io_ring_ctx_free() drops ->sqo_mm before leaving pinned_vm
over-accounted. Postpone mm cleanup for when it's not needed anymore.

Fixes: 309758254ea62 ("io_uring: report pinned memory usage")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
fs/io_uring.c diff | blob | history
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