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SubjectRe: Linux Buffer Cache Does Not Support Mirroring
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> I looked at the brw_page code.  While everyone calls this an "async"
> interface, in fact, it uses the same semantic as a sync interface and
> does not allow support for callbacks.

Its a function pointer. What else do you need other than passing a parameter
void * or similar to get more flexibility.

You can use the callback to wake a thread, you can schedule a task after
IRQ completion, you can do stuff directly on the IRQ callback if you are
careful about deadlocks.



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