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author | Wang Nan <wangnan0@huawei.com> | 2016-01-11 14:48:02 +0100 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-01-11 23:22:22 +0100 |
commit | 71b3ee7e65ffb48135d875d9c36e3183b9ecffeb (patch) | |
tree | 44e032ad00d350d23dac06e6be4d47d100ff4f4e | |
parent | tools build: Add BPF feature check to test-all (diff) | |
download | linux-71b3ee7e65ffb48135d875d9c36e3183b9ecffeb.tar.xz linux-71b3ee7e65ffb48135d875d9c36e3183b9ecffeb.zip |
perf test: Fix false TEST_OK result for 'perf test hist'
Commit 71d6de64fedd ("perf test: Fix hist testcases when kptr_restrict is on")
solves a double free problem when 'perf test hist' calling
setup_fake_machine(). However, the result is still incorrect. For example:
$ ./perf test -v 'filtering hist entries'
25: Test filtering hist entries :
--- start ---
test child forked, pid 4186
Cannot create kernel maps
test child finished with 0
---- end ----
Test filtering hist entries: Ok
In this case the body of this test is not get executed at all, but the
result is 'Ok'.
Actually, in setup_fake_machine() there's no need to create real kernel
maps. What we want are the fake maps. This patch removes the
machine__create_kernel_maps() in setup_fake_machine(), so it won't be
affected by kptr_restrict setting.
Test result:
$ cat /proc/sys/kernel/kptr_restrict
1
$ ~/perf test -v hist
15: Test matching and linking multiple hists :
--- start ---
test child forked, pid 24031
test child finished with 0
---- end ----
Test matching and linking multiple hists: Ok
[SNIP]
Suggested-and-Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1452520124-2073-12-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r-- | tools/perf/tests/hists_common.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/tools/perf/tests/hists_common.c b/tools/perf/tests/hists_common.c index bcfd081ee1d2..071a8b5f5232 100644 --- a/tools/perf/tests/hists_common.c +++ b/tools/perf/tests/hists_common.c @@ -87,11 +87,6 @@ struct machine *setup_fake_machine(struct machines *machines) return NULL; } - if (machine__create_kernel_maps(machine)) { - pr_debug("Cannot create kernel maps\n"); - return NULL; - } - for (i = 0; i < ARRAY_SIZE(fake_threads); i++) { struct thread *thread; |