why cudaHostRegister failed when pinned memory is larger than 4GB

In Xavier platform, I used cudaHostRegister to register pinned memory, but it failed when the size is over 4GB.
Why?
Somebody help me, thanks very much!

I have the same problem, someone help please!

Hi,

Thanks for the feedback.

We can reproduce this issue and is going to check this with our internal team.
Will update with you once we have further information.

Hi,

Sorry for keeping you waiting.
We are still checking this issue and will update information with you once we got any feedback.

Thanks.

Hi,

How is that going?
I have waiting for more than 3 months.

Please feedback.

Hi,

Thanks for your patience.
Unfortunately, we still need some time for this.

Sorry for the inconvenience.