Re: [RFC v3 7/8] blkio: implement BDRV_REQ_REGISTERED_BUF optimization

2022-08-18 Thread Stefan Hajnoczi
On Thu, Jul 14, 2022 at 12:13:53PM +0200, Hanna Reitz wrote: > On 08.07.22 06:17, Stefan Hajnoczi wrote: > > Avoid bounce buffers when QEMUIOVector elements are within previously > > registered bdrv_register_buf() buffers. > > > > The idea is that emulated storage controllers will register guest

Re: [RFC v3 7/8] blkio: implement BDRV_REQ_REGISTERED_BUF optimization

2022-08-16 Thread Stefan Hajnoczi
On Tue, Jul 12, 2022 at 04:28:02PM +0200, Stefano Garzarella wrote: > On Fri, Jul 08, 2022 at 05:17:36AM +0100, Stefan Hajnoczi wrote: > > Avoid bounce buffers when QEMUIOVector elements are within previously > > registered bdrv_register_buf() buffers. > > > > The idea is that emulated storage

Re: [RFC v3 7/8] blkio: implement BDRV_REQ_REGISTERED_BUF optimization

2022-07-14 Thread Hanna Reitz
On 08.07.22 06:17, Stefan Hajnoczi wrote: Avoid bounce buffers when QEMUIOVector elements are within previously registered bdrv_register_buf() buffers. The idea is that emulated storage controllers will register guest RAM using bdrv_register_buf() and set the BDRV_REQ_REGISTERED_BUF on I/O

Re: [RFC v3 7/8] blkio: implement BDRV_REQ_REGISTERED_BUF optimization

2022-07-12 Thread Stefano Garzarella
On Fri, Jul 08, 2022 at 05:17:36AM +0100, Stefan Hajnoczi wrote: Avoid bounce buffers when QEMUIOVector elements are within previously registered bdrv_register_buf() buffers. The idea is that emulated storage controllers will register guest RAM using bdrv_register_buf() and set the

[RFC v3 7/8] blkio: implement BDRV_REQ_REGISTERED_BUF optimization

2022-07-07 Thread Stefan Hajnoczi
Avoid bounce buffers when QEMUIOVector elements are within previously registered bdrv_register_buf() buffers. The idea is that emulated storage controllers will register guest RAM using bdrv_register_buf() and set the BDRV_REQ_REGISTERED_BUF on I/O requests. Therefore no blkio_map_mem_region()