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authorStefan Hajnoczi <stefanha@linux.vnet.ibm.com>2012-02-07 13:27:26 +0000
committerKevin Wolf <kwolf@redhat.com>2012-02-09 16:17:50 +0100
commit79c053bde9fa40595670ae274d047da07f1df88c (patch)
treedc859b1ca2cb3345bdc665fca11f9c0cf4b35cf5 /trace-events
parentf08f2ddae078e8a7683f8b16da8e0cc3029c7b89 (diff)
block: perform zero-detection during copy-on-read
Copy-on-Read populates the image file with data read from a backing image. In order to avoid bloating the image file when all zeroes are read we should scan the buffer and perform an optimized zero write operation. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'trace-events')
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