I got a boost failure that looks like the following. The Reader pipe counts look good to me but there seem to be boost failures. FWIW, I have seen this occasionally on older kernels but it was not at all consistently reproducible. I am archiving it here for future reference: BUG: TREE03 FAILURE, 0 instances [ 1523.216753] rcu-torture: !!! [ 1523.225344] WARNING: CPU: 5 PID: 170 at kernel/rcu/rcutorture.c:2227 rcu_torture_stats_print+0x5b2/0x620 [ 1523.365730] Call Trace: [ 1538.579852] rcu-torture: !!! Reader Pipe: 3676261572 201726 0 0 0 0 0 0 0 0 0 [ 1554.053752] rcu-torture: !!! Reader Pipe: 3714202738 203792 0 0 0 0 0 0 0 0 0 [ 1569.304750] rcu-torture: !!! Reader Pipe: 3750940990 205374 0 0 0 0 0 0 0 0 0 [ 1587.205665] rcu-torture: !!! Reader Pipe: 3783052619 207952 0 0 0 0 0 0 0 0 0 [ 1602.581730] rcu-torture: !!! Reader Pipe: 3815601996 209733 0 0 0 0 0 0 0 0 0 [ 1617.935231] rcu-torture: !!! Reader Pipe: 3851086565 211846 0 0 0 0 0 0 0 0 0 [ 1633.300072] rcu-torture: !!! Reader Pipe: 3903324168 213499 0 0 0 0 0 0 0 0 0 Full torture test directory on this failure is at: http://box.joelfernandes.org:9080/job/rcutorture_stable/job/linux-6.5.y/2/artifact/tools/testing/selftests/rcutorture/res/2023.08.31-21.44.10/TREE03/ thanks, - Joel