[Fault-injection-developer] RE: [DISCUSSION] make decisions about ficl

[Zhuang, L. <lou...@in...>]

> But the problem is that, user always forgets to remove 
> trigger before remove
> interceptor, and make system oops.
Oh, I'm resolving this problem now. Maybe in two or three hours.

The *real* hard problem is, when user put a trigger on a device driver's
MMIO space (the driver got it by calling "ioremap"), the PF interceptor will
set the page of MMIO as 'UNPRESENT'. After a while, user remove the device
driver without remove trigger firstly. In the case, the iounmap called by
driver's cleanup method will find one of MMIO page is UNPRESENT. It really
confuses iounmap and oops. So we should prevent user from removing device
driver before removing trigger. But as Stan said, it much mess up our code.


Yours truly,
Louis Zhuang
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