[LTP] [PATCH v3 15/16] fs/fs_fill: Add a test to fill a FS in a few threads

[Li Wang]

Hi Cyril,

This case always broken in SAFE_* operations, seems the reason is no
space left on the device,
so I wonder if is it necessary to create so many thread "CPUs + 2" to
run the test?

What about just creating half of CPU number thread (nthreads =
tst_ncpus_conf()/2 + 1) there?

$ git diff
diff --git a/testcases/kernel/fs/fs_fill/fs_fill.c
b/testcases/kernel/fs/fs_fill/fs_fill.c
index a50a22f..13207c4 100644
--- a/testcases/kernel/fs/fs_fill/fs_fill.c
+++ b/testcases/kernel/fs/fs_fill/fs_fill.c
@@ -106,7 +106,7 @@ static void testrun(void)

 static void setup(void)
 {
-       nthreads = tst_ncpus_conf() + 2;
+       nthreads = tst_ncpus_conf()/2 + 1;

        tst_res(TINFO, "Running %i writer threads", nthreads);
 }


Broken message:
==============
fs_fill.c:104: PASS: Got 73 ENOSPC runtime 1000ms
tst_mkfs.c:83: INFO: Formatting /dev/loop1 with xfs opts='' extra opts=''
tst_test.c:970: INFO: Timeout per run is 0h 05m 00s
fs_fill.c:111: INFO: Running 66 writer threads
safe_macros.c:225: BROK: tst_fill_fs.c:43:
open(mntpoint/thread48/file0,65,0700) failed: ENOSPC



-- 
Li Wang
liwang@redhat.com