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| author | Paul E. McKenney <paulmck@kernel.org> | 2023-02-02 16:40:07 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2023-02-02 16:40:07 -0800 |
| commit | bba8d3d17dc2678f9647962900aa421a18c25320 (patch) | |
| tree | 6d174ba5d2e9210c79355991d06188bd4820382c /kernel/rcu/tree.c | |
| parent | 8e1704b6a8c91f37910f4d9957857f6d4424415c (diff) | |
| parent | 84ec7c20363f46a4031695eceb0374c1c4d6b9ec (diff) | |
Merge branch 'stall.2023.01.09a' into HEAD
stall.2023.01.09a: RCU CPU stall-warning updates.
Diffstat (limited to 'kernel/rcu/tree.c')
| -rw-r--r-- | kernel/rcu/tree.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 739219a78b84..8e880c09ab59 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -866,6 +866,24 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp) rdp->rcu_iw_gp_seq = rnp->gp_seq; irq_work_queue_on(&rdp->rcu_iw, rdp->cpu); } + + if (rcu_cpu_stall_cputime && rdp->snap_record.gp_seq != rdp->gp_seq) { + int cpu = rdp->cpu; + struct rcu_snap_record *rsrp; + struct kernel_cpustat *kcsp; + + kcsp = &kcpustat_cpu(cpu); + + rsrp = &rdp->snap_record; + rsrp->cputime_irq = kcpustat_field(kcsp, CPUTIME_IRQ, cpu); + rsrp->cputime_softirq = kcpustat_field(kcsp, CPUTIME_SOFTIRQ, cpu); + rsrp->cputime_system = kcpustat_field(kcsp, CPUTIME_SYSTEM, cpu); + rsrp->nr_hardirqs = kstat_cpu_irqs_sum(rdp->cpu); + rsrp->nr_softirqs = kstat_cpu_softirqs_sum(rdp->cpu); + rsrp->nr_csw = nr_context_switches_cpu(rdp->cpu); + rsrp->jiffies = jiffies; + rsrp->gp_seq = rdp->gp_seq; + } } return 0; |