[LTP] [PATCH] readahead02: set dynamic run time

[Li Wang]

The readahead time-consuming is quit depending on the platform IO
speed, test get timeout once the default max_runtime is used up.

  readahead02.c:223: TINFO: Test #1: readahead on overlayfs file
  ...
  readahead02.c:286: TINFO: read_testfile(0) took: 63382903 usec
  readahead02.c:287: TINFO: read_testfile(1) took: 47943122 usec
  ...
  readahead02.c:312: TPASS: using cache as expected
  readahead02.c:223: TINFO: Test #2: POSIX_FADV_WILLNEED on file
  readahead02.c:128: TINFO: creating test file of size: 67108864
  readahead02.c:241: TINFO: read_testfile(0)
  Test timeouted, sending SIGKILL!

Let's raise the maximum runtime dynamically.

Signed-off-by: Li Wang <liwang@redhat.com>
---
 testcases/kernel/syscalls/readahead/readahead02.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/testcases/kernel/syscalls/readahead/readahead02.c b/testcases/kernel/syscalls/readahead/readahead02.c
index b6c097b31..dc03c5931 100644
--- a/testcases/kernel/syscalls/readahead/readahead02.c
+++ b/testcases/kernel/syscalls/readahead/readahead02.c
@@ -318,6 +318,19 @@ static void test_readahead(unsigned int n)
 		tst_res(TCONF, "Page cache on your system is too small "
 			"to hold whole testfile.");
 	}
+
+	/*
+	 * The time consuming of readahead quite depending on the platform IO
+	 * speed, sometime test timeout when the default max_runtime is used up.
+	 *
+	 *  readahead02.c:221: TINFO: Test #2: POSIX_FADV_WILLNEED on file
+	 *  readahead02.c:285: TINFO: read_testfile(0) took: 26317623 usec
+	 *  readahead02.c:286: TINFO: read_testfile(1) took: 26101484 usec
+	 *
+	 * Here raise the maximum runtime dynamically.
+	 */
+	if ((tc+1)->readahead)
+		tst_set_max_runtime(test.max_runtime + (usec + usec_ra) / 1000000);
 }
 
 
-- 
2.40.1