Hi! On Thu, Feb 6, 2025 at 3:30 PM Stefan Hajnoczi <stefanha@xxxxxxxxxx> wrote: > > 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@xxxxxxxxxx/ > > 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. It is partially that, indeed. But what has me blocked for now on posting the next version is that I was reworking a bit the MMAP strategy. Following David comments, I am relying more on RAMBlocks and subregions for mmaps. But this turned out more difficult than anticipated. I hope I can make it work this month and then post the next version. If there are no major blockers/reworks, further iterations on the patch shall go smoother. I have a separate patch for the vhost-user spec which could iterate faster, if that'd help. BR, Albert. > > Please discuss with Albert if QEMU support is urgent. > > Stefan
