fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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Akanksha Mahajan c0e0f30667 Implement AbortIO using io_uring (#10125) ... Summary: Implement AbortIO in posix using io_uring to cancel any pending read requests submitted. Its cancelled using io_uring_prep_cancel which sets the IORING_OP_ASYNC_CANCEL flag. To cancel a request, the sqe must have ->addr set to the user_data of the request it wishes to cancel. If the request is cancelled successfully, the original request is completed with -ECANCELED and the cancel request is completed with a result of 0. If the request was already running, the original may or may not complete in error. The cancel request will complete with -EALREADY for that case. And finally, if the request to cancel wasn't found, the cancel request is completed with -ENOENT. Reference: https://kernel.dk/io_uring-whatsnew.pdf, https://lore.kernel.org/io-uring/d9a8d76d23690842f666c326631ecc2d85b6c1bc.1615566409.git.asml.silence@gmail.com/ Pull Request resolved: https://github.com/facebook/rocksdb/pull/10125 Test Plan: Existing Posix tests. Reviewed By: anand1976 Differential Revision: D36946970 Pulled By: akankshamahajan15 fbshipit-source-id: 3bc1f1521b3151d01a348fc6431eb3fc85db3a14		3 years ago
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rocksdb	Implement AbortIO using io_uring (#10125)	3 years ago