On 4/17/20 5:15 AM, Johannes Thumshirn wrote:
Synchronous direct I/O to a sequential write only zone can be issued using the new REQ_OP_ZONE_APPEND request operation. As dispatching multiple BIOs can potentially result in reordering, we cannot support asynchronous IO via this interface. We also can only dispatch up to queue_max_zone_append_sectors() via the new zone-append method and have to return a short write back to user-space in case an IO larger than queue_max_zone_append_sectors() has been issued.
Is this patch the only patch that adds a user space interface through which REQ_OP_ZONE_APPEND operations can be submitted? Has it been considered to make it possible to submit REQ_OP_ZONE_APPEND operations through the asynchronous I/O mechanism?
Thanks, Bart.
