This issue also affects cosmic/linux-kvm.
** Also affects: linux-kvm (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Changed in: linux-kvm (Ubuntu Cosmic)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1812318
Title:
ftrace test in ubuntu_kernel_selftests failed on KVM kernels
Status in ubuntu-kernel-tests:
New
Status in linux-kvm package in Ubuntu:
New
Status in linux-kvm source package in Bionic:
Confirmed
Status in linux-kvm source package in Cosmic:
Confirmed
Bug description:
This test failed with:
Error: No ftrace directory found
In the script:
DEBUGFS_DIR=`grep debugfs /proc/mounts | cut -f2 -d' ' | head -1`
if [ -z "$DEBUGFS_DIR" ]; then
TRACING_DIR=`grep tracefs /proc/mounts | cut -f2 -d' ' | head -1`
else
TRACING_DIR=$DEBUGFS_DIR/tracing
fi
The script exit here:
# Verify parameters
if [ -z "$TRACING_DIR" -o ! -d "$TRACING_DIR" ]; then
errexit "No ftrace directory found"
fi
DEBUGFS_DIR=/sys/kernel/debug
TRACING_DIR=/sys/kernel/debug/tracing
ls: cannot access '/sys/kernel/debug/tracing': No such file or
directory
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-1028-kvm 4.15.0-1028.28
ProcVersionSignature: User Name 4.15.0-1028.28-kvm 4.15.18
Uname: Linux 4.15.0-1028-kvm x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
Date: Fri Jan 18 03:04:17 2019
SourcePackage: linux-kvm
UpgradeStatus: No upgrade log present (probably fresh install)
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