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| author |   Suren Baghdasaryan <surenb@google.com> | 2019-07-26 09:22:26 -0700 |
|---|---|---|
| committer |   Christian Brauner <christian.brauner@ubuntu.com> | 2019-08-06 19:52:41 +0200 |
| commit | aed5a8df3dbbd804409d40f821e0768891cfd5ab (patch) | |
| tree | 3a3b1c235554ebed6f5ccfa5fd64b272d036888d /tools/testing/selftests/pidfd/Makefile | |
| parent | tests: move common definitions and functions into pidfd.h (diff) | |
| download | linux-dev-aed5a8df3dbbd804409d40f821e0768891cfd5ab.tar.xz linux-dev-aed5a8df3dbbd804409d40f821e0768891cfd5ab.zip | |
tests: add pidfd poll tests
This adds testing for polling on pidfd of a process being killed. Test runs
10000 iterations by default to stress test pidfd polling functionality.
It accepts an optional command-line parameter to override the number or
iterations to run.
Specifically, it tests for:
- pidfd_open on a child process succeeds
- pidfd_send_signal on a child process succeeds
- polling on pidfd succeeds and returns exactly one event
- returned event is POLLIN
- event is received within 3 secs of the process being killed
10000 iterations was chosen because of the race condition being tested
which is not consistently reproducible but usually is revealed after less
than 2000 iterations.
Reveals race fixed by commit b191d6491be6 ("pidfd: fix a poll race when setting exit_state")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Link: https://lore.kernel.org/r/20190726162226.252750-2-surenb@google.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to '')
| -rw-r--r-- | tools/testing/selftests/pidfd/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/pidfd/Makefile b/tools/testing/selftests/pidfd/Makefile index 7c97e890f353..464c9b76148f 100644 --- a/tools/testing/selftests/pidfd/Makefile +++ b/tools/testing/selftests/pidfd/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only CFLAGS += -g -I../../../../usr/include/ -lpthread -TEST_GEN_PROGS := pidfd_test pidfd_open_test pidfd_wait +TEST_GEN_PROGS := pidfd_test pidfd_open_test pidfd_poll_test pidfd_wait include ../lib.mk |