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subiquity: Use LazyUnmount=yes on memorymapped /usr/lib/modules.

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Subiquity images mount /usr/lib/modules from a squashfs, which systemd
tries to unmount on shutdown, whilst they are still being in use. As
systemd-udevd kmod built-in's libkmod has modules.* files
memorymapped. This produces an warning on shutdown, flooding the
screen with messages as systemd switches to a more verbose
output. Specify LazyUnmount=yes on that mount, such that unmount call
succeeds without flooding the shutdown log.
This commit is contained in:
Dimitri John Ledkov 2019-10-08 19:04:17 +01:00
parent fd9257c294
commit 4c534bc6be
2 changed files with 17 additions and 2 deletions
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12
debian/changelog vendored
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@ -1,3 +1,15 @@
livecd-rootfs (2.616) UNRELEASED; urgency=medium
* Subiquity images mount /usr/lib/modules from a squashfs, which systemd
tries to unmount on shutdown, whilst they are still being in use. As
systemd-udevd kmod built-in's libkmod has modules.* files
memorymapped. This produces an warning on shutdown, flooding the
screen with messages as systemd switches to a more verbose
output. Specify LazyUnmount=yes on that mount, such that unmount call
succeeds without flooding the shutdown log.
-- Dimitri John Ledkov <xnox@ubuntu.com> Fri, 04 Oct 2019 19:35:56 +0100
livecd-rootfs (2.615) eoan; urgency=medium livecd-rootfs (2.615) eoan; urgency=medium
* magic-proxy: dump proxy log to stdout on failure * magic-proxy: dump proxy log to stdout on failure

7
live-build/ubuntu-server/hooks/033-kernel-bits.binary
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@ -67,8 +67,11 @@ prereqs) exit 0;;
esac esac
echo ${kernel_metapkg} > /run/kernel-meta-package echo ${kernel_metapkg} > /run/kernel-meta-package
mkdir -p \$rootmnt/lib/modules mkdir -p \$rootmnt/usr/lib/modules
mount \$rootmnt/cdrom/casper/extras/modules.squashfs-$flavor \$rootmnt/lib/modules mount \$rootmnt/cdrom/casper/extras/modules.squashfs-$flavor \$rootmnt/usr/lib/modules
mkdir -p /run/systemd/system/usr-lib-modules.mount.d
echo '[Mount]' >> /run/systemd/system/usr-lib-modules.mount.d/lazy.conf
echo 'LazyUnmount=yes' >> /run/systemd/system/usr-lib-modules.mount.d/lazy.conf
EOF EOF
chmod +x "$KERNEL_BITS_ROOT"/etc/initramfs-tools/scripts/init-bottom/live-server chmod +x "$KERNEL_BITS_ROOT"/etc/initramfs-tools/scripts/init-bottom/live-server