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由 Josh Durgin 提交于
QEMU (and librbd) flush the cache on the source before the destination starts, and the destination does not read any changeable data before that, so live migration with rbd caching is safe. This makes 'virsh migrate' work with rbd and caching without the --unsafe flag. Reported-by: NVladimir Bashkirtsev <vladimir@bashkirtsev.com> Signed-off-by: NJosh Durgin <josh.durgin@inktank.com> (cherry picked from commit 78290b16)
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