linux/tools/testing/kunit
David Gow 7fd53f41f7 kunit: tool: Disable PAGE_POISONING under --alltests
kunit_tool maintains a list of config options which are broken under
UML, which we exclude from an otherwise 'make ARCH=um allyesconfig'
build used to run all tests with the --alltests option.

Something in UML allyesconfig is causing segfaults when page poisining
is enabled (and is poisoning with a non-zero value). Previously, this
didn't occur, as allyesconfig enabled the CONFIG_PAGE_POISONING_ZERO
option, which worked around the problem by zeroing memory. This option
has since been removed, and memory is now poisoned with 0xAA, which
triggers segfaults in many different codepaths, preventing UML from
booting.

Note that we have to disable both CONFIG_PAGE_POISONING and
CONFIG_DEBUG_PAGEALLOC, as the latter will 'select' the former on
architectures (such as UML) which don't implement __kernel_map_pages().

Ideally, we'd fix this properly by tracking down the real root cause,
but since this is breaking KUnit's --alltests feature, it's worth
disabling there in the meantime so the kernel can boot to the point
where tests can actually run.

Fixes: f289041ed4 ("mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO")
Signed-off-by: David Gow <davidgow@google.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2021-03-11 14:37:37 -07:00
..
configs kunit: tool: Disable PAGE_POISONING under --alltests 2021-03-11 14:37:37 -07:00
test_data kunit: tools: fix kunit_tool tests for parsing test plans 2020-10-26 13:25:40 -06:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
kunit_config.py kunit: tool: Fix a python tuple typing error 2021-03-11 14:37:37 -07:00
kunit_json.py kunit: tool: surface and address more typing issues 2021-01-15 17:49:34 -07:00
kunit_kernel.py kunit: tool: fix unintentional statefulness in run_kernel() 2021-02-08 16:10:22 -07:00
kunit_parser.py kunit: tool: fix minor typing issue with None status 2021-01-15 17:51:47 -07:00
kunit_tool_test.py kunit: tool: add support for filtering suites by glob 2021-02-08 16:10:00 -07:00
kunit.py kunit: tool: add support for filtering suites by glob 2021-02-08 16:10:00 -07:00