On Fri, 8 Jul 2022 at 15:06, Fernando T. Reagan <fernando.t.rea...@gmail.com> wrote: > I have a custom amd64 Docker image that is based on CentOS 7 and has a UNIX > application installed in it. > The amd64 Docker image and the application inside work without problems on an > amd64 computer. > > However, when starting this image with Docker Desktop or Podman on an Apple > Silicon CPU, the application does not start. > The error we get from the application is something like this: > "Kernel asynchronous I/O not initialized because it is not supported by this > host. Install the appropriate asynchronous I/O libraries." > > As far as I know, Docker and Podman are using qemu to emulate processors. > Is it a known limitation that asynchronous I/O of amd64 processors does not > work on Apple Silicon? Or is there a way I can get this amd64 image to work > on an Apple Silicon computer?
This probably isn't Apple Silicon specific -- likely it just means that QEMU does not implement some syscall that your application is using, and your application doesn't have a fallback codepath to do something else. You can test this hypothesis by trying the app on QEMU on a Linux host. You should check you're using the most recent version of QEMU, in case the bug has been fixed. If it's still there, if you can provide a reproducible test case not involving Docker/Podman then you can file a bug report in the QEMU bug tracker. thanks -- PMM