[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240828154040.2803428-1-vdonnefort@google.com>
Date: Wed, 28 Aug 2024 16:40:39 +0100
From: Vincent Donnefort <vdonnefort@...gle.com>
To: rostedt@...dmis.org
Cc: mhiramat@...nel.org, linux-kernel@...r.kernel.org,
linux-trace-kernel@...r.kernel.org, mathieu.desnoyers@...icios.com,
kernel-team@...roid.com, david@...hat.com,
Vincent Donnefort <vdonnefort@...gle.com>
Subject: [PATCH 1/2] ring-buffer/selftest: Verify the entire meta-page padding
Improve the ring-buffer meta-page test coverage by checking for the
entire padding region to be 0 instead of just looking at the first 4
bytes.
Signed-off-by: Vincent Donnefort <vdonnefort@...gle.com>
--
Hi,
I saw you have sent "Align meta-page to sub-buffers for improved TLB usage" to
linux-next, so here's a follow-up patch addressing your comments, not sure if
you want to squash it or to put it on top.
diff --git a/tools/testing/selftests/ring-buffer/map_test.c b/tools/testing/selftests/ring-buffer/map_test.c
index 4bb0192e43f3..ba12fd31de87 100644
--- a/tools/testing/selftests/ring-buffer/map_test.c
+++ b/tools/testing/selftests/ring-buffer/map_test.c
@@ -231,15 +231,15 @@ TEST_F(map, data_mmap)
/* Verify meta-page padding */
if (desc->meta->meta_page_size > getpagesize()) {
- void *addr;
-
data_len = desc->meta->meta_page_size;
data = mmap(NULL, data_len,
PROT_READ, MAP_SHARED, desc->cpu_fd, 0);
ASSERT_NE(data, MAP_FAILED);
- addr = (void *)((unsigned long)data + getpagesize());
- ASSERT_EQ(*((int *)addr), 0);
+ for (int i = desc->meta->meta_struct_len;
+ i < desc->meta->meta_page_size; i += sizeof(int))
+ ASSERT_EQ(*(int *)(data + i), 0);
+
munmap(data, data_len);
}
}
base-commit: 2a07e30c19f391af26517c409fd66e401c6f4ee7
prerequisite-patch-id: 16b79d676c5faf3b57443b576976c7522fcd5a4b
--
2.46.0.295.g3b9ea8a38a-goog
Powered by blists - more mailing lists