On 02/24, Oleg Nesterov wrote: > > Just in case, did you use > > https://git.kernel.org/pub/scm/utils/rt-tests/rt-tests.git/tree/src/hackbench/hackbench.c > > ? Or did you use another version? Exactly what parameters did you use? If possible, please reproduce the hang again. How many threads/processes sleeping in pipe_read() or pipe_write() do you see? (you can look at /proc/$pid/stack). Please pick one sleeping writer, and do $ strace -p pidof_that_write this should wake this writer up. If a missed wakeup is the only problem, hackbench should continue. The more info you can provide the better ;) Oleg.
