Re: [Qemu-devel] [PATCH v5 3/4] block: add BDRV_REQ_SERIALISING flag

2018-07-09 Thread Fam Zheng
On Mon, 07/09 19:37, Vladimir Sementsov-Ogievskiy wrote: > Serialized writes should be used in copy-on-write of backup(sync=none) > for image fleecing scheme. > > We need to change an assert in bdrv_aligned_pwritev, added in > 28de2dcd88de. The assert may fail now, because call to > wait_serialisi

[Qemu-devel] [PATCH v5 3/4] block: add BDRV_REQ_SERIALISING flag

2018-07-09 Thread Vladimir Sementsov-Ogievskiy
Serialized writes should be used in copy-on-write of backup(sync=none) for image fleecing scheme. We need to change an assert in bdrv_aligned_pwritev, added in 28de2dcd88de. The assert may fail now, because call to wait_serialising_requests here may become first call to it for this request with se