Update: compiling qemu upstream & using the latest version didn't change anything.
I don't know if this is an instance of user emulation limitations due to missing syscalls. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1858046 Title: qemu-aarch64 hangs on cptofs during a build of NixOS SD card image Status in QEMU: New Bug description: First, thank you for this incredible project. While following this guide to build my own image of NixOS: https://nixos.wiki/wiki/NixOS_on_ARM#Compiling_through_QEMU on ARM Aarch64. I encountered a very strange behavior, qemu is correctly used and build most of the binaries until it executes this exact line over qemu: https://github.com/NixOS/nixpkgs/blob/master/nixos/lib/make- ext4-fs.nix#L55 At this step, the qemu process goes to 100 % of CPU, hangs in a certain syscall I don't know which one (according to strace & gdb which has no symbols so breaking and looking the backtrace was useless). According to iotop, no I/O was done. And it spent all its time in this syscall during more than 10 hours, which looks anomalous to me. I attach some of my CPU info: model : 142 model name : Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz stepping : 10 microcode : 0x96 cpu MHz : 3107.071 cache size : 8192 KB I'm using a ThinkPad T480 to perform those builds, I'm uncertain of how to debug further this issue, I discussed this with some people over #nixos-aarch64 and they told me they didn't know how to debug it further too. I tried all with this package: https://aur.archlinux.org/packages /qemu-arm-static/ — I'm currently compiling qemu-git to see if it happens on upstream too. Will comment when it's done. Thank you in advance! To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1858046/+subscriptions
