Re: [PATCH v6 01/26] fuse: Fix dax truncate/punch_hole fault path

Stefan Hajnoczi
2025-02-06T14:42:40Z

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On Thu, Feb 06, 2025 at 08:37:07AM -0500, Vivek Goyal wrote:
> And then there are challenges at QEMU level. virtiofsd needs additional
> vhost-user commands to implement DAX and these never went upstream in
> QEMU. I hope these challenges are sorted at some point of time.

Albert Esteve has been working on QEMU support:
https://lore.kernel.org/qemu-devel/20240912145335.129447-1-aesteve@redhat.com/

He has a viable solution. I think the remaining issue is how to best
structure the memory regions. The reason for slow progress is not
because it can't be done, it's probably just because this is a
background task.

Please discuss with Albert if QEMU support is urgent.

Stefan

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