[Qemu-block] [PATCH v3 1/3] xen-block: improve batching behaviour

From: Tim Smith When I/O consists of many small requests, performance is improved by batching them together in a single io_submit() call. When there are relatively few requests, the extra overhead is not worth it. This introduces a check to start batching I/O requests via blk_io_plug()/

[Qemu-block] [PATCH v3 1/3] xen-block: improve batching behaviour

From: Tim Smith When I/O consists of many small requests, performance is improved by batching them together in a single io_submit() call. When there are relatively few requests, the extra overhead is not worth it. This introduces a check to start batching I/O requests via blk_io_plug()/