28.08.2019 16:04, Eric Blake wrote:
> On 8/28/19 4:57 AM, Vladimir Sementsov-Ogievskiy wrote:
>
>>> Hence, it is desirable to have a way for clients to specify that a
>>> particular write zero request is being attempted for a fast wipe, and
>>> get an immediate failure if the zero request would ot
On 8/28/19 4:57 AM, Vladimir Sementsov-Ogievskiy wrote:
>> Hence, it is desirable to have a way for clients to specify that a
>> particular write zero request is being attempted for a fast wipe, and
>> get an immediate failure if the zero request would otherwise take the
>> same time as a write.
23.08.2019 17:34, Eric Blake wrote:
> While it may be counterintuitive at first, the introduction of
> NBD_CMD_WRITE_ZEROES and NBD_CMD_BLOCK_STATUS has caused a performance
> regression in qemu [1], when copying a sparse file. When the
> destination file must contain the same contents as the sourc
