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9408d8a37e
Drivers can poll requests directly, so use that. We just need to ensure the driver's request was allocated from a polled hctx, so a special driver flag is added to struct io_uring_cmd. The allows unshared and multipath namespaces to use the same polling callback, and multipath is guaranteed to get the same queue as the command was submitted on. Previously multipath polling might check a different path and poll the wrong info. The other bonus is we don't need a bio payload in order to poll, allowing commands like 'flush' and 'write zeroes' to be submitted on the same high priority queue as read and write commands. Finally, using the request based polling skips the unnecessary bio overhead. Signed-off-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20230612190343.2087040-3-kbusch@meta.com Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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