Am 01.09.2014 um 11:22 hat Fam Zheng geschrieben:
> This is an analogue to Linux null_blk. It can be used for testing or
> benchmarking block device emulation and general block layer
> functionalities such as coroutines and throttling, where disk IO is not
> necessary or wanted.
>
> Use null-aio:// for AIO version, and null-co:// for coroutine version.
>
> Signed-off-by: Fam Zheng <f...@redhat.com>
> Reviewed-by: Benoît Canet <benoit.ca...@nodalink.com>
> +static BlockDriver bdrv_null_co = {
> + .format_name = "null-co",
> + .protocol_name = "null-co",
> + .instance_size = sizeof(BDRVNullState),
> +
> + .bdrv_file_open = null_file_open,
> + .bdrv_close = null_close,
> + .bdrv_getlength = null_getlength,
> +
> + .bdrv_read = null_co_read,
> + .bdrv_write = null_co_write,
Any reason not to use the native .bdrv_co_readv/writev interfaces
instead of the old, emulated versions that involve a bounce buffer?
> + .bdrv_co_flush_to_disk = null_co_flush,
> +};
Kevin
