kernel/linux.git/tools/testing/selftests/rcutorture, branch v6.2.2

torture: Make torture.sh create a properly formatted log file

2022-10-20T22:29:08+00:00

Currently, if the torture.sh allmodconfig step fails, this is counted as an error (as it should be), but there is also an extraneous complaint about a missing log file. This commit therefore adds that log file, which is hoped to reduce confused reactions to the error report. Signed-off-by: Paul E. McKenney

rcutorture: Avoid torture.sh compressing identical files

2022-10-20T22:28:38+00:00

Currently, torture.sh will compress the vmlinux files for KASAN and KCSAN runs. But it will compress all of the files, including those copied verbatim by the kvm-again.sh script. Compression takes around ten minutes, so this is not a good thing. This commit therefore compresses only one of a given set of identical vmlinux files, and then hard-links it to the directories produced by kvm-again.sh. Signed-off-by: Paul E. McKenney

rcutorture: Avoid redundant builds for rcuscale and refscale in torture.sh

2022-10-18T22:02:59+00:00

This commit causes torture.sh to use the new --bootargs and --datestamp parameters to kvm-again.sh in order to avoid redundant kernel builds during rcuscale and refscale testing. This trims the better part of an hour off of torture.sh runs that use --do-kasan. Signed-off-by: Paul E. McKenney

rcutorture: Add --datestamp parameter to kvm-again.sh

2022-10-18T22:02:59+00:00

This commit adds a --datestamp parameter to kvm-again.sh, which, in contrast to the existing --rundir argument, specifies only the last segments of the pathname. This addition enables torture.sh to use kvm-again.sh in order to avoid redundant kernel builds. Signed-off-by: Paul E. McKenney

rcutorture: Make kvm-recheck.sh export TORTURE_SUITE

2022-10-18T22:02:59+00:00

As it should, the kvm-recheck.sh script sets the TORTURE_SUITE bash variable based on the type of rcutorture test being run. However, it does not export it. Which is OK, at least until you try running kvm-again.sh on either a rcuscale or a refscale test, at which point you get false-positive "no success message, N successful version messages" errors. This commit therefore causes the kvm-recheck.sh script to export TORTURE_SUITE, suppressing these false positives. Signed-off-by: Paul E. McKenney

rcutorture: Make kvm-test-1-run-qemu.sh check for alternative output

2022-10-18T22:02:59+00:00

The kvm-again.sh script, when running locally, can place the QEMU output into kvm-test-1-run-qemu.sh.out instead of kvm-test-1-run.sh.out. This commit therefore makes kvm-test-1-run-qemu.sh check both locations. Signed-off-by: Paul E. McKenney

torture: Use mktemp instead of guessing at unique names

2022-10-18T22:02:59+00:00

This commit drags the rcutorture scripting kicking and screaming into the twenty-first century by making use of the BSD-derived mktemp command to create temporary files and directories. In happy contrast to many of its ill-behaved predecessors, mktemp seems to actually work reasonably reliably! Signed-off-by: Paul E. McKenney

rcutorture: Add --bootargs parameter to kvm-again.sh

2022-10-18T22:02:59+00:00

The kvm-again.sh script can be used to repeat short boot-time tests, but the kernel boot arguments cannot be changed. This means that every change in kernel boot arguments currently necessitates a kernel build, which greatly increases the duration of kernel-boot testing. This commit therefore adds a --bootargs parameter to kvm-again.sh, which allows a given kernel to be repeatedly booted, but overriding old and adding new kernel boot parameters. This allows an old kernel to be booted with new kernel boot parameters, avoiding the overhead of rebuilding the kernel under test. Signed-off-by: Paul E. McKenney

torture: Create kvm-check-branches.sh output in proper location

2022-06-21T22:57:04+00:00

Currently, kvm-check-branches.sh causes each kvm.sh invocation create a separate date-stamped directory, then after that invocation completes, moves it into the *-group/NNNN directory. This works, but makes it more difficult to monitor an ongoing run. This commit therefore uses the kvm.sh --datestamp argument to make kvm.sh put the output in the right place to start with, and also dispenses with the additional level of datestamping. (Those wanting datestamps can find them in the log files.) Signed-off-by: Paul E. McKenney

torture: Adjust to again produce debugging information

2022-06-21T22:57:04+00:00

A recent change to the DEBUG_INFO Kconfig option means that simply adding CONFIG_DEBUG_INFO=y to the .config file and running "make oldconfig" no longer works. It is instead necessary to add CONFIG_DEBUG_INFO_NONE=n and (for example) CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y. This combination will then result in CONFIG_DEBUG_INFO being selected. This commit therefore updates the Kconfig options produced in response to the kvm.sh --gdb, --kasan, and --kcsan Kconfig options. Fixes: f9b3cd245784 ("Kconfig.debug: make DEBUG_INFO selectable from a choice") Signed-off-by: Paul E. McKenney