Re: [Xen-devel] [PATCH] xen_disk: support cache backend option

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

Il 26/06/2013 19:48, Stefano Stabellini ha scritto:
> +    if (!strcmp(blkdev->cache, "none")) {
> +        qflags = BDRV_O_NATIVE_AIO | BDRV_O_NOCACHE;
> +    } else if (!strcmp(blkdev->cache, "writethrough")) {
> +        qflags = 0;
> +    } else {
> +        /* default to writeback */
> +        qflags = BDRV_O_NATIVE_AIO | BDRV_O_CACHE_WB;
> +    }

You can use bdrv_parse_cache_flags.  Note that BDRV_O_NATIVE_AIO
requires BDRV_O_NOCACHE too (but if you only specify BDRV_O_NATIVE_AIO
it's a no-op, not an error).

Paolo

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