[LU-16224] rw_seq_cst_vs_drop_caches dies with SIGBUS

Related — Fri, 26 May 2023 20:59:54 +0000

Running the reproducer from ~~LU-14541~~ (rw_seq_cst_vs_drop_caches.c) fails about 50% of the time with Lustre 2.15.1 (both client and servers).

[root@mutt21:toss-5803-sigbus]# ./run_test /p/olaf{a,b}/faaland1/test/sigbustest
++ ./rw_seq_cst_vs_drop_caches /p/olafa/faaland1/test/sigbustest /p/olafb/faaland1/test/sigbustest
u = 60, v = { 60, 59 }
./run_test: line 11: 120055 Aborted                 (core dumped) ./rw_seq_cst_vs_drop_caches $1 $2
++ status=134
++ signum=6
++ case $signum in
++ echo FAIL with SIGBUS
FAIL with SIGBUS

Although it's not yet confirmed to be the same issue, we have two users reporting jobs dying with a bus error intermittently, when using Lustre for I/O, which is what prompted me to run this against Lustre 2.15.1.

Whamcloud Community JIRA

[LU-16224] rw_seq_cst_vs_drop_caches dies with SIGBUS