kernel.git/tools/testing/selftests/rcutorture/bin, branch master

rcutorture: Add --kill-previous option to terminate previous kvm.sh runs

2026-01-04T10:51:14Z

When kvm.sh is killed, its child processes (make, gcc, qemu, etc.) may continue running. This prevents new kvm.sh instances from starting even though the parent is gone. Add a --kill-previous option that uses fuser(1) to terminate all processes holding the flock file before attempting to acquire it. This provides a clean way to recover from stale/zombie kvm.sh runs which sometimes may have lots of qemu and compiler processes still disturbing. Signed-off-by: Joel Fernandes Tested-by: Paul E. McKenney Signed-off-by: Boqun Feng

rcutorture: Prevent concurrent kvm.sh runs on same source tree

2026-01-04T10:50:59Z

Add flock-based locking to kvm.sh to prevent multiple instances from running concurrently on the same source tree. This prevents build failures caused by one instance's "make clean" deleting generated files while another instance is building causing build failures. The lock file is placed in the rcutorture directory and added to .gitignore. Signed-off-by: Joel Fernandes Tested-by: Paul E. McKenney Signed-off-by: Boqun Feng

torture: Include commit discription in testid.txt

2026-01-01T08:44:37Z

Currently, the testid.txt file in the top-level directory of the rcutorture results contains the output of "git rev-parse HEAD", which just gives the full SHA-1 of the current commit. This is followed by the output of "git status", which is further followed by the output of "git diff". This works, but is less than helpful to human readers scanning a list of commits. This commit therefore instead uses "git show --oneline --no-patch HEAD", which provides a short SHA-1, but also the names of any branches and the commit's title. Signed-off-by: Paul E. McKenney Signed-off-by: Boqun Feng

torture: Make config2csv.sh properly handle comments in .boot files

2026-01-01T08:44:36Z

As in strip the "#" and everything after it and *then* tokenize. Signed-off-by: Paul E. McKenney Signed-off-by: Boqun Feng

torture: Make kvm-series.sh give run numbers and totals

2026-01-01T08:44:36Z

The kvm-series.sh script can easily be convinced to run on the order of 1,000 guest OSes, so some sort of progress indicator would be helpful. This commit therefore updates the "Starting" output lines to read as in the following example, adding the ("3 of 4"): Starting TREE02/1.7e0ad1b49057 using 8 CPUs (4 of 4) Sat Nov 8 10:51:06 PM PST 2025 Signed-off-by: Paul E. McKenney Signed-off-by: Boqun Feng

torture: Make kvm-series.sh give build numbers and totals

2026-01-01T08:44:36Z

The kvm-series.sh script can easily be convinced to do on the order of 1,000 builds, so some sort of progress indicator would be helpful. This commit therefore updates the "Starting" output lines to read as in the following example, adding the ("2 of 4"): Starting TREE01/1.7e0ad1b49057 (2 of 4) at Sat Nov 8 10:08:21 PM PST 2025 Signed-off-by: Paul E. McKenney Signed-off-by: Boqun Feng

torture: Parallelize kvm-series.sh guest-OS execution

2026-01-01T08:44:34Z

Currently, kvm-series.sh builds and runs serially, which makes for long execution times. This commit changes its logic to build all of the needed kernels serially, but then run the corresponding guest OSes concurrently in batches using the entire machine. On large systems, this results in order-of-magnitude speedups of the guest-OS execution portion of the runtime. Signed-off-by: Paul E. McKenney Signed-off-by: Boqun Feng

Merge branch 'rcu/misc' into next

2025-11-30T21:20:33Z

- In order to prepare the layout for nohz_full work deferral to user exit, the context tracking state must shrink the counter of transitions to/from RCU not watching. The only possible hazard is to trigger wrap-around more easily, delaying a bit grace periods when that happens. This should be a rare event though. Yet add debugging and torture code to test that assumption. - Fix memory leak on locktorture module - Annotate accesses in rculist_nulls.h to prevent from KCSAN warnings. On recent discussions, we also concluded that all those WRITE_ONCE() and READ_ONCE() on list APIs deserve appropriate comments. Something to be expected for the next cycle. - Provide a script to apply several configs to several commits with torture. - Allow torture to reuse a build directory in order to save needless rebuild time. - Various cleanups.

torture: Permit negative kvm.sh --kconfig numberic arguments

2025-11-07T12:57:38Z

This commit loosens the kvm.sh script's regular expressions to permit negative-valued Kconfig options, for example: --kconfig CONFIG_CMDLINE_LOG_WRAP_IDEAL_LEN=-1 Signed-off-by: Paul E. McKenney Signed-off-by: Frederic Weisbecker

rcutorture: Permit kvm-again.sh to re-use the build directory

2025-11-05T23:03:12Z

This commit adds "inplace" and "inplace-force" values to the kvm-again.sh "--link" argument, which causes the run's output to be placed into the build directory. This could be used to save build time if the machine went down partway into a run, but it can also be used to do a large number of builds, and run the resulting kernels concurrently even if the builds are based on different commits. A later commit will add this latter capability to kvm-series.sh in order to produce large speedups for branch-checking operations. Signed-off-by: Paul E. McKenney Signed-off-by: Frederic Weisbecker