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Message-ID: <20140429002455.GA15461@linux.vnet.ibm.com>
Date: Mon, 28 Apr 2014 17:24:55 -0700
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: mingo@...nel.org, laijs@...fujitsu.com, dipankar@...ibm.com,
akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
josh@...htriplett.org, niv@...ibm.com, tglx@...utronix.de,
peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com,
edumazet@...gle.com, darren@...art.com, fweisbec@...il.com,
oleg@...hat.com, sbw@....edu
Subject: [PATCH tip/core/rcu 0/44] Torture-test changes for 3.16
Hello!
This series provides torture-test updates:
1. Add forward-progress checking to distinguish between stalls in
the RCU implementation and in the torture test itself.
2. Remove the --builddir and --relbuilddir options, which have been
obsoleted by the parallel testing facility.
3. Make "--dryrun sched" output more readable by clearly indicating
where each batch of concurrent runs starts.
4. Make torture-test errors less RCU-specific. ("Hey, why did
my locktorture run complain about RCU???")
5,8-14. Rename variables to reflect the new RCU-independence of a number
of the torture-test scripts.
6. Reduce locktorture sleeping to increase intensity.
7. Add a --defconfig argument to allow other default configs to
be specified.
15. Make config-fragment filtering RCU-independent.
16. Mark private functions as static in kernel/rcu/torture.c,
courtesy of Rashika Kheria.
17-18. Make the output of "--dryrun script" independently runnable.
19. Print negative numbers when SRCU counters wrap instead of
huge 64-bit integers.
20. Fix "Stopping" torture messages.
21. Report any diagnostics issued by qemu.
22. Make kthreads spin during the last jiffy of a stutter period
to increase the intensity of torture stop-start events.
23. Permit multiple qemu and boot arguments to be specified on
the command line.
24. Choose bzImage location based on architecture.
25. Add tracing-enabled variant of TREE02 to aid debugging.
26. Dump the ftrace buffer when the RCU grace period stalls.
27. Export the RCU grace-period kthread wait state to rcutorture
to ease diagnosis of RCU grace-period stalls.
28. Fix bug in raw_cpu_inc_return().
29. Make cond_resched() report RCU quiescent states.
30. Make rcu_torture_reader() use cond_resched() instead of
unconditionally invoking schedule().
31. Complain if an all-zero cpumask is specified during a torture
shuffle operation, courtesy of Iulia Manda.
32. Make build failures more evident.
33. Capture and report the torture_create_kthread() return value when
creating the rcu_torture_fqs kthread.
34. Use elapsed time to detect hangs rather than counting "sleep 1"
commands.
35. Rearrange config fragments to ensure that RCU-sched primitives are
tested in TREE_PREEMPT_RCU kernels.
36. Add rcutorture tests for get_state_synchronize_rcu() and
cond_synchronize_rcu().
37. Add explicit tests for synchronous grace-period primitives.
38. Add missing destroy_timer_on_stack(), courtesy of Thomas Gleixner.
39. Make scripts record "git diff HEAD" to ease reproduction of
an unexpected torture-test result.
40. Run rcu_torture_writer() at normal priority.
41. Put the qemu process into the background to better handle
kernel hangs.
42. Remove reference to a non-existent Kconfig parameter.
43. Refuse to run multiple concurrent torture tests.
44. Remove __init from torture_init_begin() and torture_init_end()
to allow rcutorture to once again work as a loadable module.
45. Remove unused torture_parm() macro.
Thanx, Paul
------------------------------------------------------------------------
b/include/linux/percpu.h | 2
b/include/linux/rcupdate.h | 19 +
b/include/linux/rcutiny.h | 4
b/include/linux/rcutree.h | 1
b/include/linux/torture.h | 2
b/kernel/locking/locktorture.c | 3
b/kernel/rcu/rcutorture.c | 37 ++
b/kernel/rcu/tree.c | 18 +
b/kernel/rcu/tree.h | 8
b/kernel/rcu/update.c | 18 +
b/kernel/sched/core.c | 7
b/kernel/torture.c | 5
b/tools/testing/selftests/rcutorture/bin/configinit.sh | 2
b/tools/testing/selftests/rcutorture/bin/functions.sh | 12
b/tools/testing/selftests/rcutorture/bin/kvm-build.sh | 2
b/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh | 2
b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh | 2
b/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh | 2
b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh | 2
b/tools/testing/selftests/rcutorture/bin/kvm.sh | 16
b/tools/testing/selftests/rcutorture/bin/parse-torture.sh | 106 ++++++
b/tools/testing/selftests/rcutorture/configs/rcu/TREE02-T | 25 +
b/tools/testing/selftests/rcutorture/configs/rcu/TREE08.boot | 1
include/linux/rcupdate.h | 36 ++
include/linux/torture.h | 6
kernel/locking/locktorture.c | 7
kernel/rcu/rcutorture.c | 193 +++++++----
kernel/rcu/tree.c | 17
kernel/torture.c | 36 +-
tools/testing/selftests/rcutorture/bin/functions.sh | 35 +
tools/testing/selftests/rcutorture/bin/kvm-build.sh | 4
tools/testing/selftests/rcutorture/bin/kvm-recheck.sh | 24 +
tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh | 44 +-
tools/testing/selftests/rcutorture/bin/kvm.sh | 162 +++++----
tools/testing/selftests/rcutorture/bin/parse-rcutorture.sh | 106 ------
35 files changed, 649 insertions(+), 317 deletions(-)
--
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