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| author | Gustavo Luiz Duarte <gustavold@linux.ibm.com> | 2020-02-11 06:38:30 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-03-20 05:10:23 +0300 |
| commit | 915b7f6f9a5e232c138bb36743a1fdb0fcf2c432 (patch) | |
| tree | 65b8ecdd53bfe3b45e85be24de2d511a1cd59210 /tools/testing/selftests/powerpc/tm/.gitignore | |
| parent | 61da50b76b62fd815aa82d853bf82bf4f69568f5 (diff) | |
| download | linux-915b7f6f9a5e232c138bb36743a1fdb0fcf2c432.tar.xz | |
selftests/powerpc: Add tm-signal-pagefault test
This test triggers a TM Bad Thing by raising a signal in transactional state
and forcing a pagefault to happen in kernelspace when the kernel signal
handling code first touches the user signal stack.
This is inspired by the test tm-signal-context-force-tm but uses userfaultfd to
make the test deterministic. While this test always triggers the bug in one
run, I had to execute tm-signal-context-force-tm several times (the test runs
5000 times each execution) to trigger the same bug.
tm-signal-context-force-tm is kept instead of replaced because, while this test
is more reliable and triggers the same bug, tm-signal-context-force-tm has a
better coverage, in the sense that by running the test several times it might
trigger the pagefault and/or be preempted at different places.
v3: skip test if userfaultfd is unavailable.
Signed-off-by: Gustavo Luiz Duarte <gustavold@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200211033831.11165-2-gustavold@linux.ibm.com
Diffstat (limited to 'tools/testing/selftests/powerpc/tm/.gitignore')
| -rw-r--r-- | tools/testing/selftests/powerpc/tm/.gitignore | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/tm/.gitignore b/tools/testing/selftests/powerpc/tm/.gitignore index 98f2708d86cc..e1c72a4a3e91 100644 --- a/tools/testing/selftests/powerpc/tm/.gitignore +++ b/tools/testing/selftests/powerpc/tm/.gitignore @@ -13,6 +13,7 @@ tm-signal-context-chk-vmx tm-signal-context-chk-vsx tm-signal-context-force-tm tm-signal-sigreturn-nt +tm-signal-pagefault tm-vmx-unavail tm-unavailable tm-trap |