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This exposes `IORING_SETUP_NO_SQARRAY` (available since Linux 6.6) which removes the SQ index array indirection, eliminating a memory read per submission. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
When IORING_SETUP_NO_SQARRAY is set, the kernel sets sq_off.array to 0. The SQ array initialization loop was writing to offset 0 of the SQ mmap, corrupting the ring header (sq_head, sq_tail, etc.). Skip the array initialization when NO_SQARRAY is set since the kernel consumes SQEs directly by ring index. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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This PR adds a
setup_no_sqarraybuilder method to enableIORING_SETUP_NO_SQARRAY. This was done with the assistance of Claude.