On Friday, January 29th, 2021 at 3:13 PM, Pekka Paalanen <ppaala...@gmail.com> 
wrote:

> > Re-importing it adds quite a huge CPU overhead to both userspace as well
> > as the kernel.
>
> Perhaps, but so far it seems no-one has noticed the overhead, with Mesa
> at least.
>
> I happily stand corrected.

Note, all of this doesn't mean that compositors will stop keeping
DMA-BUF FDs around. They may want to keep them open for other purposes
like importing them into KMS or other EGL displays as needed.
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