In now dm-crypt code, we find it only send one scatterlist which maps
one segment of one bio to the crypto engine at one time. But that will
be more time-consuming and ineffective for the crypto engine.
For XTS mode, it can map the whole bio with multiple scatterlists,
and send all the
In now dm-crypt code, we find it only send one scatterlist which maps
one segment of one bio to the crypto engine at one time. But that will
be more time-consuming and ineffective for the crypto engine.
For XTS mode, it can map the whole bio with multiple scatterlists,
and send all the
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