kselftest/arm64: Verify KSM page merge for MTE pages

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Add a testcase to check that KSM should not merge pages containing
same data with same/different MTE tag values.

This testcase has one positive tests and passes if page merging
happens according to the above rule. It also saves and restores
any modified ksm sysfs entries.

Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20201002115630.24683-6-amit.kachhap@arm.com
Signed-off-by: Will Deacon <will@kernel.org>

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This commit is contained in:

Amit Daniel Kachhap 2020-10-02 17:26:29 +05:30 • committed by Will Deacon

parent 53ec81d232

commit f981d8fa26

2 changed files with 160 additions and 0 deletions

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1

tools/testing/selftests/arm64/mte/.gitignore vendored

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159

tools/testing/selftests/arm64/mte/check_ksm_options.c

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