Discovered in the Open Source Lab of Oregon State University when running torture.sh on a ppc64le VM. Two bugs were exposed:
1. The kvm-transform.sh call hard-coded "bzImage" as the kernel image name. On ppc64, the boot image is vmlinux, not bzImage, so the re-run failed to find the image. Fix this by extracting the QEMU binary from the qemu-cmd file and passing it to identify_boot_image() to obtain the correct architecture-specific image name, the same way kvm.sh already does. 2. The rm -f invocation on re-run listed vmlinux among the files to delete. On ppc64 vmlinux is the boot image, so deleting it broke the re-run on that architecture. Drop vmlinux from the unconditional list, and instead conditionally delete it only when the boot image basename is not vmlinux. In addition, identify qemu_binary before the copy step so that on non-PowerPC systems (where vmlinux is not the boot image) the vmlinux file can be removed immediately after the run directory is copied, saving storage before any tests run. This also eliminates the per-iteration re-computation of qemu_binary and boot_image inside the qemu-cmd transform loop. Tested on a local x86_64 machine and on a PPC VM of the Open Source Lab of Oregon State University. Signed-off-by: Zhouyi Zhou <[email protected]> --- Changes in v3: - Identify qemu_binary and boot_image earlier, before the copy step, so that vmlinux can be removed right after copying the run directory on non-PowerPC systems, saving storage. This also eliminates the per-iteration re-computation of qemu_binary and boot_image inside the qemu-cmd transform loop. Suggested-by: Paul E. McKenney <[email protected]> --- tools/testing/selftests/rcutorture/bin/kvm-again.sh | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/rcutorture/bin/kvm-again.sh b/tools/testing/selftests/rcutorture/bin/kvm-again.sh index b5239b52cb5d..9060b3dc8926 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm-again.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm-again.sh @@ -180,6 +180,9 @@ fi echo ---- Re-run results directory: $rundir +qemu_binary="$(find "$oldrun" -maxdepth 2 -name 'qemu-cmd' -type f 2>/dev/null | head -1 | xargs -r grep -v '^#' 2>/dev/null | awk 'NF { print $1; exit }')" +boot_image="`identify_boot_image "$qemu_binary"`" + if test "$oldrun" != "$rundir" then # Copy old run directory tree over and adjust. @@ -189,7 +192,7 @@ then echo "Cannot copy from $oldrun to $rundir." usage fi - rm -f "$rundir"/*/{console.log,console.log.diags,qemu_pid,qemu-pid,qemu-retval,Warnings,kvm-test-1-run.sh.out,kvm-test-1-run-qemu.sh.out,vmlinux} "$rundir"/log + rm -f "$rundir"/*/{console.log,console.log.diags,qemu_pid,qemu-pid,qemu-retval,Warnings,kvm-test-1-run.sh.out,kvm-test-1-run-qemu.sh.out} "$rundir"/log touch "$rundir/log" echo $scriptname $args | tee -a "$rundir/log" echo $oldrun > "$rundir/re-run" @@ -197,6 +200,10 @@ then then $arg_link "$oldrun/../../bin" "$rundir/../.." fi + if test "`basename "$boot_image"`" != vmlinux + then + rm -f "$rundir"/*/vmlinux + fi else # Check for a run having already happened. find "$rundir" -name console.log -print > $T/oldrun-console.log @@ -217,7 +224,7 @@ do qemu_cmd_dir="`dirname "$i"`" kernel_dir="`echo $qemu_cmd_dir | sed -e 's/\.[0-9]\+$//'`" jitter_dir="`dirname "$kernel_dir"`" - kvm-transform.sh "$kernel_dir/bzImage" "$qemu_cmd_dir/console.log" "$jitter_dir" "$dur" "$bootargs" < $T/qemu-cmd > $i + kvm-transform.sh "$kernel_dir/`basename $boot_image`" "$qemu_cmd_dir/console.log" "$jitter_dir" "$dur" "$bootargs" < $T/qemu-cmd > $i if test -n "$arg_remote" then echo "# TORTURE_KCONFIG_GDB_ARG=''" >> $i -- 2.43.0
