On 03/14/2010 08:06 PM, Gleb Natapov wrote:
Suggest simply reentering every N executions.
This restart mechanism is, in fact, needed for ins read ahead to work.
After reading ahead from IO port we need to avoid entering decoder
until entire cache is consumed otherwise decoder will clear cache and
data will be lost. So we can't just enter guest in arbitrary times, only
when read ahead cache is empty. Since read ahead is never done across
page boundary this is save place to re-enter guest.
Please make the two depend on each other directly then. We can't expect
the reader of the emulator code know that.
Have the emulator ask the buffer when it is empty.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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