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| author | Jason Baron <jbaron@redhat.com> | 2009-03-12 14:33:36 -0400 |
|---|---|---|
| committer | Steven Rostedt <srostedt@redhat.com> | 2009-03-12 21:15:02 -0400 |
| commit | 5d592b44b29a1d73e13d5c9e3426eed843bdc359 (patch) | |
| tree | e26ec625e6fb5efdbbf41d0bba940a2dbac19f50 /kernel/softirq.c | |
| parent | e447e1df2e568cd43d1918963c9f09fae85aea57 (diff) | |
| download | linux-5d592b44b29a1d73e13d5c9e3426eed843bdc359.tar.gz linux-5d592b44b29a1d73e13d5c9e3426eed843bdc359.tar.bz2 linux-5d592b44b29a1d73e13d5c9e3426eed843bdc359.zip | |
tracing: tracepoints for softirq entry/exit - add softirq-to-name array
Create a 'softirq_to_name' array, which is indexed by softirq #, so
that we can easily convert between the softirq index # and its name, in
order to get more meaningful output messages.
LKML-Reference: <20090312183336.GB3352@redhat.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'kernel/softirq.c')
| -rw-r--r-- | kernel/softirq.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/softirq.c b/kernel/softirq.c index 7571bcb71be4..9f90fdc039f4 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -53,6 +53,12 @@ static struct softirq_action softirq_vec[NR_SOFTIRQS] __cacheline_aligned_in_smp static DEFINE_PER_CPU(struct task_struct *, ksoftirqd); +char *softirq_to_name[NR_SOFTIRQS] = { + "HI_SOFTIRQ", "TIMER_SOFTIRQ", "NET_TX_SOFTIRQ", "NET_RX_SOFTIRQ", + "BLOCK_SOFTIRQ", "TASKLET_SOFTIRQ", "SCHED_SOFTIRQ", "HRTIMER_SOFTIRQ", + "RCU_SOFTIRQ" +}; + /* * we cannot loop indefinitely here to avoid userspace starvation, * but we also don't want to introduce a worst case 1/HZ latency @@ -209,9 +215,10 @@ restart: h->action(h); if (unlikely(prev_count != preempt_count())) { - printk(KERN_ERR "huh, entered softirq %td %p" + printk(KERN_ERR "huh, entered softirq %td %s %p" "with preempt_count %08x," " exited with %08x?\n", h - softirq_vec, + softirq_to_name[h - softirq_vec], h->action, prev_count, preempt_count()); preempt_count() = prev_count; } |