On Thu, Mar 31, 2011 at 12:06:41PM +0200, Gleb Natapov wrote: > Currently we sync registers back and forth before/after exiting > to userspace for IO, but during IO device model shouldn't need to > read/write the registers, so we can as well skip those sync points. The > only exaception is broken vmware backdor interface. The new code sync > registers content during IO only if registers are read from/written to > by userspace in the middle of the IO operation and this almost never > happens in practise. > > Signed-off-by: Gleb Natapov <[email protected]> > --- > v1->v2 > - rebased onto see emulation patchset.
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