selftests: ublk: make ublk_stop_io_daemon() more reliable

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Improve ublk_stop_io_daemon() in the following ways:

- don't wait if ->ublksrv_pid becomes -1, which means that the disk
has been stopped

- don't wait if ublk char device doesn't exist any more, so we can
avoid to rely on inoitfy for wait until the char device is closed

And this way may reduce time of delete command a lot.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20250303124324.3563605-2-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Ming Lei 2025-03-03 20:43:11 +08:00 • committed by Jens Axboe

parent 30c970354c

commit 9894e0eaae

1 changed files with 14 additions and 10 deletions

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tools/testing/selftests/ublk/kublk.c

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