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| author | Alberto Garcia <berto@igalia.com> | 2017-06-19 16:40:08 +0300 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-06-26 14:51:13 +0200 |
| commit | ee22a9d86921310672aa8775489217f3e2f5e1c6 (patch) | |
| tree | 8c2f02810e7f5954afdb65a64a9cb8f2504adfed /scripts | |
| parent | 86b862c431ae5effa80a095c9c989a5a9976ead1 (diff) | |
| download | qemu-ee22a9d86921310672aa8775489217f3e2f5e1c6.zip qemu-ee22a9d86921310672aa8775489217f3e2f5e1c6.tar.gz qemu-ee22a9d86921310672aa8775489217f3e2f5e1c6.tar.bz2 | |
qcow2: Merge the writing of the COW regions with the guest data
If the guest tries to write data that results on the allocation of a
new cluster, instead of writing the guest data first and then the data
from the COW regions, write everything together using one single I/O
operation.
This can improve the write performance by 25% or more, depending on
several factors such as the media type, the cluster size and the I/O
request size.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions