From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: David Miller <davem@davemloft.net>,
bpf@vger.kernel.org, netdev@vger.kernel.org,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Sebastian Sewior <bigeasy@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Clark Williams <williams@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Juri Lelli <juri.lelli@redhat.com>,
Ingo Molnar <mingo@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Vinicius Costa Gomes <vinicius.gomes@intel.com>,
Jakub Kicinski <kuba@kernel.org>
Subject: [patch V3 13/22] bpf/tests: Use migrate disable instead of preempt disable
Date: Mon, 24 Feb 2020 15:01:44 +0100 [thread overview]
Message-ID: <20200224145643.785306549@linutronix.de> (raw)
In-Reply-To: 20200224140131.461979697@linutronix.de
From: David Miller <davem@davemloft.net>
Replace the preemption disable/enable with migrate_disable/enable() to
reflect the actual requirement and to allow PREEMPT_RT to substitute it
with an actual migration disable mechanism which does not disable
preemption.
[ tglx: Switched it over to migrate disable ]
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
lib/test_bpf.c | 4 ++--
net/bpf/test_run.c | 8 ++++----
2 files changed, 6 insertions(+), 6 deletions(-)
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -6660,14 +6660,14 @@ static int __run_one(const struct bpf_pr
u64 start, finish;
int ret = 0, i;
- preempt_disable();
+ migrate_disable();
start = ktime_get_ns();
for (i = 0; i < runs; i++)
ret = BPF_PROG_RUN(fp, data);
finish = ktime_get_ns();
- preempt_enable();
+ migrate_enable();
*duration = finish - start;
do_div(*duration, runs);
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -37,7 +37,7 @@ static int bpf_test_run(struct bpf_prog
repeat = 1;
rcu_read_lock();
- preempt_disable();
+ migrate_disable();
time_start = ktime_get_ns();
for (i = 0; i < repeat; i++) {
bpf_cgroup_storage_set(storage);
@@ -54,18 +54,18 @@ static int bpf_test_run(struct bpf_prog
if (need_resched()) {
time_spent += ktime_get_ns() - time_start;
- preempt_enable();
+ migrate_enable();
rcu_read_unlock();
cond_resched();
rcu_read_lock();
- preempt_disable();
+ migrate_disable();
time_start = ktime_get_ns();
}
}
time_spent += ktime_get_ns() - time_start;
- preempt_enable();
+ migrate_enable();
rcu_read_unlock();
do_div(time_spent, repeat);
next prev parent reply other threads:[~2020-02-24 15:05 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-24 14:01 [patch V3 00/22] bpf: Make BPF and PREEMPT_RT co-exist Thomas Gleixner
2020-02-24 14:01 ` [patch V3 01/22] bpf: Tighten the requirements for preallocated hash maps Thomas Gleixner
2020-02-24 14:01 ` [patch V3 02/22] bpf: Enforce preallocation for instrumentation programs on RT Thomas Gleixner
2020-02-24 14:01 ` [patch V3 03/22] bpf: Update locking comment in hashtab code Thomas Gleixner
2020-02-24 14:01 ` [patch V3 04/22] bpf/tracing: Remove redundant preempt_disable() in __bpf_trace_run() Thomas Gleixner
2020-02-24 14:01 ` [patch V3 05/22] bpf/trace: Remove EXPORT from trace_call_bpf() Thomas Gleixner
2020-02-24 18:16 ` Alexei Starovoitov
2020-02-24 14:01 ` [patch V3 06/22] bpf/trace: Remove redundant preempt_disable " Thomas Gleixner
2020-02-24 19:40 ` Alexei Starovoitov
2020-02-24 20:42 ` Thomas Gleixner
2020-02-25 0:33 ` Alexei Starovoitov
2020-02-25 12:36 ` Thomas Gleixner
2020-02-24 14:01 ` [patch V3 07/22] perf/bpf: Remove preempt disable around BPF invocation Thomas Gleixner
2020-02-24 14:01 ` [patch V3 08/22] bpf: Remove recursion prevention from rcu free callback Thomas Gleixner
2020-02-24 14:01 ` [patch V3 09/22] bpf: Dont iterate over possible CPUs with interrupts disabled Thomas Gleixner
2020-02-24 14:01 ` [patch V3 10/22] bpf: Provide bpf_prog_run_pin_on_cpu() helper Thomas Gleixner
2020-02-24 18:14 ` Thomas Gleixner
2020-02-24 18:41 ` [patch V4 " Thomas Gleixner
2020-02-24 14:01 ` [patch V3 11/22] bpf: Replace cant_sleep() with cant_migrate() Thomas Gleixner
2020-02-24 14:01 ` [patch V3 12/22] bpf: Use bpf_prog_run_pin_on_cpu() at simple call sites Thomas Gleixner
2020-02-24 14:01 ` Thomas Gleixner [this message]
2020-02-24 14:01 ` [patch V3 14/22] bpf: Use migrate_disable/enabe() in trampoline code Thomas Gleixner
2020-02-24 14:01 ` [patch V3 15/22] bpf: Use migrate_disable/enable in array macros and cgroup/lirc code Thomas Gleixner
2020-02-24 14:01 ` [patch V3 16/22] bpf: Provide recursion prevention helpers Thomas Gleixner
2020-02-24 14:01 ` [patch V3 17/22] bpf: Use recursion prevention helpers in hashtab code Thomas Gleixner
2020-02-24 14:01 ` [patch V3 18/22] bpf: Replace open coded recursion prevention in sys_bpf() Thomas Gleixner
2020-02-24 14:01 ` [patch V3 19/22] bpf: Factor out hashtab bucket lock operations Thomas Gleixner
2020-02-24 14:01 ` [patch V3 20/22] bpf: Prepare hashtab locking for PREEMPT_RT Thomas Gleixner
2020-02-24 14:01 ` [patch V3 21/22] bpf, lpm: Make locking RT friendly Thomas Gleixner
2020-02-24 14:01 ` [patch V3 22/22] bpf/stackmap: Dont trylock mmap_sem with PREEMPT_RT and interrupts disabled Thomas Gleixner
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