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authorKevin Wolf <kwolf@redhat.com>2012-03-02 14:10:54 +0100
committerKevin Wolf <kwolf@redhat.com>2012-03-12 15:14:07 +0100
commit250196f19c6e7df12965d74a5073e10aba06c802 (patch)
tree53e93bcbfbf9355fe6d3f09e6045c3036959434c /target-unicore32
parent256900b16b0264af9e165bceabbf74dcece4ea38 (diff)
qcow2: Reduce number of I/O requests
If the first part of a write request is allocated, but the second isn't and it can be allocated so that the resulting area is contiguous, handle it at once. This is a common case for sequential writes. After this patch, alloc_cluster_offset() only checks if the clusters are already allocated or how many new clusters can be allocated contigouosly. The actual cluster allocation is split off into a new function do_alloc_cluster_offset(). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Diffstat (limited to 'target-unicore32')
0 files changed, 0 insertions, 0 deletions