Re: [Qemu-devel] write_zeroes/trim on the whole disk

[Vladimir Sementsov-Ogievskiy]

On 24.09.2016 19:31, Alex Bligh wrote:
> > On 24 Sep 2016, at 13:06, Vladimir Sementsov-Ogievskiy <address@hidden> wrote:
> >
> > Note: if disk size is not aligned to X we will have to send request larger than 
> > the disk size to clear the whole disk.
> If you look at the block size extension, the size of the disk must be an exact 
> multiple of the minimum block size. So that would work.

But there is no guarantee that disk_size/block_size < INT_MAX.. May be, 
additional option, specifying the shift would be better. With convention 
that if offset+length exceeds disk size, length should be recalculated 
as disk_size-offset.

--
Best regards,
Vladimir