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| author |   Stefan Bühler <source@stbuehler.de> | 2019-04-24 23:54:18 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2019-04-30 09:40:02 -0600 |
| commit | 115e12e58dbc055e98c965e3255aed7b20214f95 (patch) | |
| tree | be290c72e31a400bb1462eb4cacab2e4c8e64085 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | io_uring: remove unnecessary barrier before wq_has_sleeper (diff) | |
| download | wireguard-linux-115e12e58dbc055e98c965e3255aed7b20214f95.tar.xz wireguard-linux-115e12e58dbc055e98c965e3255aed7b20214f95.zip | |
io_uring: remove unnecessary barrier before reading cq head
The memory operations before reading cq head are unrelated and we
don't care about their order.
Document that the control dependency in combination with READ_ONCE and
WRITE_ONCE forms a barrier we need.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions