<div dir="ltr"><div class="gmail_default" style="font-size:small">Hi Yang,<br></div><div class="gmail_extra"><br><div class="gmail_quote">Yang Shi <span dir="ltr"><<a href="mailto:yang.shi@linux.alibaba.com" target="_blank">yang.shi@linux.alibaba.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Due to upstream kernel commit a983b5ebee57209c99f68c8327072f<wbr>25e0e6e3da<br>
("mm: memcontrol: fix excessive complexity in memory.stat reporting"),<br>
memory.stat is updated in a batch of 33 pages. This results in some test<br>
cases fail at checking stat counter since they just touch one page.<br>
<br>
Introduce TST_PAGESIZE, which is 33 * PAGESIZE, used by affected test<br>
cases, keep others still use PAGESIZE. And, this change doesn't break<br>
pre-4.16 kernel.<br>
<br>
Signed-off-by: Yang Shi <<a href="mailto:yang.shi@linux.alibaba.com">yang.shi@linux.alibaba.com</a>><br>
---<br>
testcases/kernel/controllers/<wbr>memcg/functional/memcg_lib.sh | 13 ++++++++-----<br>
.../functional/memcg_move_<wbr>charge_at_immigrate_test.sh | 14 +++++++-------<br>
.../kernel/controllers/memcg/<wbr>functional/memcg_stat_rss.sh | 12 ++++++------<br>
.../kernel/controllers/memcg/<wbr>functional/memcg_stat_test.sh | 6 +++---<br>
4 files changed, 24 insertions(+), 21 deletions(-)<br>
<br>
diff --git a/testcases/kernel/<wbr>controllers/memcg/functional/<wbr>memcg_lib.sh b/testcases/kernel/<wbr>controllers/memcg/functional/<wbr>memcg_lib.sh<br>
index 6a6af85..ad6db24 100755<br>
--- a/testcases/kernel/<wbr>controllers/memcg/functional/<wbr>memcg_lib.sh<br>
+++ b/testcases/kernel/<wbr>controllers/memcg/functional/<wbr>memcg_lib.sh<br>
@@ -34,6 +34,9 @@ if [ $? -ne 0 ]; then<br>
tst_brkm TBROK "getconf PAGESIZE failed"<br>
fi<br>
<br>
+# Post 4.16 kernel updates stat in batch (> 32 pages) every time<br>
+TST_PAGESIZE=$(( $PAGESIZE * 33 ))</blockquote><div><br></div></div><div class="gmail_default" style="font-size:small">AFAIK, LTP always reserve the ‘TST_’ prefix for general-purpose library<br>using, so we'd better avoid this in testcase variable naming.<br><br></div><div class="gmail_default" style="font-size:small">What about replacing it by PAGESIZES or PAGESIZE_NUM?</div><br>-- <br><div class="gmail_signature"><div dir="ltr"><div>Regards,<br></div><div>Li Wang<br></div></div></div>
</div></div>