forked from Minki/linux
574de8766f
Many workloads are quite sensitive to IPIs, and such workloads should build kernels with CONFIG_TASKS_TRACE_RCU_READ_MB=y to prevent RCU Tasks Trace from using them under normal conditions. However, other workloads are quite happy to permit more IPIs if doing so makes BPF program updates go faster. This commit therefore sets the default value for the rcupdate.rcu_task_ipi_delay kernel parameter to zero for kernels that have been built with CONFIG_TASKS_TRACE_RCU_READ_MB=n, while retaining the old default of (HZ / 10) for kernels that have indicated an aversion to IPIs via CONFIG_TASKS_TRACE_RCU_READ_MB=y. Link: https://lore.kernel.org/bpf/CAADnVQK_AiX+S_L_A4CQWT11XyveppBbQSQgH_qWGyzu_E8Yeg@mail.gmail.com/ Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Olsa <jolsa@redhat.com> Cc: <bpf@vger.kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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| .. | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| rcu_segcblist.c | ||
| rcu_segcblist.h | ||
| rcu.h | ||
| rcuperf.c | ||
| rcutorture.c | ||
| refscale.c | ||
| srcutiny.c | ||
| srcutree.c | ||
| sync.c | ||
| tasks.h | ||
| tiny.c | ||
| tree_exp.h | ||
| tree_plugin.h | ||
| tree_stall.h | ||
| tree.c | ||
| tree.h | ||
| update.c | ||