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e8cd481cc6
Enable flexible thread-to-queue mapping in batch I/O mode to support arbitrary combinations of threads and queues, improving resource utilization and scalability. Key improvements: - Support N:M thread-to-queue mapping (previously limited to 1:1) - Dynamic buffer allocation based on actual queue assignment per thread - Thread-safe queue preparation with spinlock protection - Intelligent buffer index calculation for multi-queue scenarios - Enhanced validation for thread/queue combination constraints Implementation details: - Add q_thread_map matrix to track queue-to-thread assignments - Dynamic allocation of commit and fetch buffers per thread - Round-robin queue assignment algorithm for load balancing - Per-queue spinlock to prevent race conditions during prep - Updated buffer index calculation using queue position within thread This enables efficient configurations like: - Any other N:M combinations for optimal resource matching Testing: - Added test_batch_02.sh: 4 threads vs 1 queue - Added test_batch_03.sh: 1 thread vs 4 queues - Validates correctness across different mapping scenarios Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>