Quoting Rogovin, Kevin (2017-12-13 11:59:41)
> Just to make sure of the reason of the original objection to trusting pread 
> blindly: 
> pread will miss writes IF the GEM BO was not listed in the execbuffer2 ioctl. 

Yes. It's just the accidental writes into the read-only bo that you may
miss. Your call, and I have no objections if such limitations are
described in the comments.
-Chris
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