Re: [PATCH v5 00/11] Add a new LOOP_CONFIGURE ioctl

Jens Axboe
2020-05-21T14:21:08Z

On 5/13/20 7:38 AM, Martijn Coenen wrote:
> This series introduces a new ioctl that makes it possible to atomically
> configure a loop device. Previously, if you wanted to set parameters
> such as the offset on a loop device, this required calling LOOP_SET_FD
> to set the backing file, and then LOOP_SET_STATUS to set the offset.
> However, in between these two calls, the loop device is available and
> would accept requests, which is generally not desirable. Similar issues
> exist around setting the block size (LOOP_SET_BLOCK_SIZE) and requesting
> direct I/O mode (LOOP_SET_DIRECT_IO).
>
> There are also performance benefits with combining these ioctls into
> one, which are described in more detail in the last change in the
> series.

Thanks, applied for 5.8.

--
Jens Axboe