On Thu, Feb 21, 2013 at 12:02:18PM +0000, Dietmar Maurer wrote: > > The problem is about cache coherency. Local files work just fine with > > cache=writeback, but if you migrate to a different host, you get the problem > > that the destination kernel may cache some parts of the image while the > > source > > is still writing to it. When you do the actual switch to the destination > > host and > > the backend doesn't take care of invalidating that cache, you might > > (partially) > > read outdated data. > > Isn't there a way to force a cache flush?
Forcing the caches for a single file to be dropped? Not that I'm aware of (or anyone else who looked into the problem before we decided to document cache=none as a requirement). Kevin
