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(parent: d3a8fa5) | 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)
commit4fa558a7c26b13894e496af4cfb7cee7b05844ae
treeca3f1b1f9be35f84d06e5dcea240740b263235e6tree | snapshot
parentd3a8fa5f6780efb98f531bed3a796803331909c3commit | 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: 5cb6648f9b393 ("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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