Bug#1053457: live-build: Building live image fails when unmounting /sys: 'target is busy'
Hello Witold Baryluk, On 05/12/2023 16:35, Witold Baryluk wrote: Also had this issue for some time (maybe 2-3 months) on my amd64 machine. But I am not so sure it is due to efivars, at least not only. > ... so I made another workaround - try to unmount efivars, then try to unmount sys in > a loop with a bit of sleep, until it finally succeeds. I'm running live-build for some time now on a UEFI-booted machine (previously I used BIOS boot) without issues. I think that the fix is applied to the git version, see https://salsa.debian.org/live-team/live-build/-/merge_requests/326 The fix does a proper unmount of efivars before unmounting sys. Can you try to run live-build from the git version to see whether that fixes the issue for you? I've written some instructions on https://wiki.debian.org/ReproducibleInstalls/LiveImages The key to running the git version is in the definition of the environment variable LIVE_BUILD which should point to the root of the git clone. With kind regards, Roland Clobus OpenPGP_signature.asc Description: OpenPGP digital signature
Bug#1053457: live-build: Building live image fails when unmounting /sys: 'target is busy'
Package: live-build Version: 1:20230502 Followup-For: Bug #1053457 X-Debbugs-Cc: witold.bary...@gmail.com Also had this issue for some time (maybe 2-3 months) on my amd64 machine. But I am not so sure it is due to efivars, at least not only. Instrumented chroot_sysfs with mount | grep chroot, and got this devpts-live on /home/user/tmp-live-build/20231205T051432Z/chroot/dev/pts type devpts (rw,relatime,gid=5,mode=620,ptmxmode=000,x-gvfs-hide) proc-live on /home/user/tmp-live-build/20231205T051432Z/chroot/proc type proc (rw,relatime,x-gvfs-hide) sysfs-live on /home/user/tmp-live-build/20231205T051432Z/chroot/sys type sysfs (rw,relatime,x-gvfs-hide) Outside of chroot efivars is indeed mounted tho: efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime) I think it is a bit racy, because sometimes I do see efivars being mounted under chroot. 2-3 months ago my workaround was to just add a bit of extra sleep (just few seconds were enough) before attempting to unmount chroot/sys. Now, this workaround does not look to be really working, so I made another workaround - try to unmount efivars, then try to unmount sys in a loop with a bit of sleep, until it finally succeds. Cheers
Bug#1053457: live-build: Building live image fails when unmounting /sys: 'target is busy'
On 2023-10-04 03:10, Emanuele Rocca wrote: > P: Begin unmounting /sys... > umount: /tmp/sid-image/chroot/sys: target is busy. > E: An unexpected failure occurred, exiting... The reason why /sys is busy is that efivarfs is mounted under /sys/firmware/efi/efivars. It seems that efivarfs gets mounted at the following stage during lb build: P: Begin installing packages (install pass)... [...] Nov 06 19:28:28 W: Possible missing firmware /lib/firmware/amdgpu/smu_13_0_10.bin for module amdgpu Nov 06 19:28:29 live-boot: core filesystems dm-verity devices utils udev blockdev dns.
Bug#1053457: live-build: Building live image fails when unmounting /sys: 'target is busy'
Package: live-build Version: 1:20230502 Severity: normal Dear Maintainer, Building a live image with `lb build` fails towards the end with the following error: P: Begin unmounting /sys... umount: /tmp/sid-image/chroot/sys: target is busy. E: An unexpected failure occurred, exiting... The issue can be reproduced as follows: lb config --distribution sid --updates false --archive-areas 'main non-free-firmware' --bootloaders grub-efi echo live-task-lxde > config/package-lists/desktop.list.chroot lb build --debug
