On Fri, Mar 2, 2012 at 6:48 PM, Kevin Wolf <kw...@redhat.com> wrote: > When a write request spans both allocated and unallocated clusters, qcow2 > splits the request in two parts. This is not necessary if we have sequential > writes: If the unallocated area can be allocated such that in the image file > it > is adjacent to the already allocated part, a single request is enough. > > Kevin Wolf (3): > qcow2: Factor out count_cow_clusters > qcow2: Add qcow2_alloc_clusters_at() > qcow2: Reduce number of I/O requests > > block/qcow2-cluster.c | 274 > +++++++++++++++++++++++++++++++++--------------- > block/qcow2-refcount.c | 28 +++++ > block/qcow2.h | 3 + > trace-events | 1 + > 4 files changed, 222 insertions(+), 84 deletions(-)
Reviewed-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com>
