On 09/17/2013 07:48 AM, Peter Lieven wrote:
> Signed-off-by: Peter Lieven <p...@kamp.de>
> ---
> block.c | 34 +++++++++++++++++++++++++++++++++-
> 1 file changed, 33 insertions(+), 1 deletion(-)
>
> diff --git a/block.c b/block.c
> index 74ec342..ecc5be4 100644
> --- a/block.c
> +++ b/block.c
> @@ -4181,7 +4181,39 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs,
> int64_t sector_num,
> }
>
> if (bs->drv->bdrv_co_discard) {
> - return bs->drv->bdrv_co_discard(bs, sector_num, nb_sectors);
> + /* if no limit is specified in the BlockDriverState use a default
> + * of 32768 512-byte sectors (16 MiB) per request.
> + */
> + int max_discard = bs->max_discard ? bs->max_discard : 32768;Worth having a named constant instead of a magic number? -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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