[RFC PATCH v4 0/3] test driver to analyse vmalloc allocator

From: Uladzislau Rezki (Sony)
Date: Thu Jan 03 2019 - 09:22:35 EST


This is v4. I think it is ready to go with, unless there are extra requests
or comments.

Changes in v4:
- Since the test can take time, switch to wait_for_completion_timeout()
with HZ sleep interval to prevent triggering of the trace about hung
- Fix clean apply for v4.20 kernel.

Changes in v3:
- Export __vmalloc_node_range() with _GPL-only prefix;
- Add skip cases if the test can not be executed in current environment.
That is kselftest framework requirement.

Changes in v2:
- Code cleanup to make it more simple;
- Now __vmalloc_node_range() is exported if CONFIG_TEST_VMALLOC_MODULE=m
- Integrate vmalloc test suite into tools/testing/selftests/vm

I think it is ready to go with, unless there are more requests or comments.

Thank you in advance.

Uladzislau Rezki (Sony) (3):
vmalloc: export __vmalloc_node_range for CONFIG_TEST_VMALLOC_MODULE
vmalloc: add test driver to analyse vmalloc allocator
selftests/vm: add script helper for CONFIG_TEST_VMALLOC_MODULE

lib/Kconfig.debug | 12 +
lib/Makefile | 1 +
lib/test_vmalloc.c | 548 +++++++++++++++++++++++++++++
mm/vmalloc.c | 9 +
tools/testing/selftests/vm/run_vmtests | 16 +
tools/testing/selftests/vm/test_vmalloc.sh | 176 +++++++++
6 files changed, 762 insertions(+)
create mode 100644 lib/test_vmalloc.c
create mode 100755 tools/testing/selftests/vm/test_vmalloc.sh