tools/testing/selftests/rcutorture/bin/kvm-test-1-run-qemu.sh

Source file repositories/reference/linux-study-clean/tools/testing/selftests/rcutorture/bin/kvm-test-1-run-qemu.sh

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/rcutorture/bin/kvm-test-1-run-qemu.sh
Extension
.sh
Size
5403 bytes
Lines
185
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
#
# Carry out a kvm-based run for the specified qemu-cmd file, which might
# have been generated by --build-only kvm.sh run.
#
# Usage: kvm-test-1-run-qemu.sh qemu-cmd-dir
#
# qemu-cmd-dir provides the directory containing qemu-cmd file.
#	This is assumed to be of the form prefix/ds/scenario, where
#	"ds" is the top-level date-stamped directory and "scenario"
#	is the scenario name.  Any required adjustments to this file
#	must have been made by the caller.  The shell-command comments
#	at the end of the qemu-cmd file are not optional.
#
# Copyright (C) 2021 Facebook, Inc.
#
# Authors: Paul E. McKenney <paulmck@kernel.org>

T="`mktemp -d ${TMPDIR-/tmp}/kvm-test-1-run-qemu.sh.XXXXXX`"
trap 'rm -rf $T' 0

resdir="$1"
if ! test -d "$resdir"
then
	echo $0: Nonexistent directory: $resdir
	exit 1
fi
if ! test -f "$resdir/qemu-cmd"
then
	echo $0: Nonexistent qemu-cmd file: $resdir/qemu-cmd
	exit 1
fi

echo ' ---' `date`: Starting kernel, PID $$

# Obtain settings from the qemu-cmd file.
grep '^#' $resdir/qemu-cmd | sed -e 's/^# //' > $T/qemu-cmd-settings
. $T/qemu-cmd-settings

# Decorate qemu-cmd with affinity, redirection, backgrounding, and PID capture
taskset_command=
if test -n "$TORTURE_AFFINITY"
then
	taskset_command="taskset -c $TORTURE_AFFINITY "
fi
sed -e 's/^[^#].*$/'"$taskset_command"'& 2>\&1 \&/' < $resdir/qemu-cmd > $T/qemu-cmd
echo 'qemu_pid=$!' >> $T/qemu-cmd
echo 'echo $qemu_pid > $resdir/qemu-pid' >> $T/qemu-cmd
echo 'taskset -c -p $qemu_pid > $resdir/qemu-affinity' >> $T/qemu-cmd

# In case qemu refuses to run...
echo "NOTE: $QEMU either did not run or was interactive" > $resdir/console.log

# Attempt to run qemu
kstarttime=`gawk 'BEGIN { print systime() }' < /dev/null`
( . $T/qemu-cmd; wait `cat  $resdir/qemu-pid`; echo $? > $resdir/qemu-retval ) &
commandcompleted=0
if test -z "$TORTURE_KCONFIG_GDB_ARG"
then
	sleep 10 # Give qemu's pid a chance to reach the file
	if test -s "$resdir/qemu-pid"
	then
		qemu_pid=`cat "$resdir/qemu-pid"`
		echo Monitoring qemu job at pid $qemu_pid `date`
	else
		qemu_pid=""
		echo Monitoring qemu job at yet-as-unknown pid `date`
	fi
fi

Annotation

Implementation Notes