diff options
| author | Waiman Long <longman@redhat.com> | 2020-02-06 10:24:04 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-02-11 13:10:48 +0100 |
| commit | b9875e9882295749a14b31e16dd504ae904cf070 (patch) | |
| tree | 2abe4142ce079796aa61be4a618cdb54e3134745 /kernel/locking | |
| parent | b3b9c187dc2544923a601733a85352b9ddaba9b3 (diff) | |
locking/lockdep: Display irq_context names in /proc/lockdep_chains
Currently, the irq_context field of a lock chains displayed in
/proc/lockdep_chains is just a number. It is likely that many people
may not know what a non-zero number means. To make the information more
useful, print the actual irq names ("softirq" and "hardirq") instead.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200206152408.24165-3-longman@redhat.com
Diffstat (limited to 'kernel/locking')
| -rw-r--r-- | kernel/locking/lockdep_proc.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/locking/lockdep_proc.c b/kernel/locking/lockdep_proc.c index 231684cfc5ae..c2224381c149 100644 --- a/kernel/locking/lockdep_proc.c +++ b/kernel/locking/lockdep_proc.c @@ -128,6 +128,13 @@ static int lc_show(struct seq_file *m, void *v) struct lock_chain *chain = v; struct lock_class *class; int i; + static const char * const irq_strs[] = { + [0] = "0", + [LOCK_CHAIN_HARDIRQ_CONTEXT] = "hardirq", + [LOCK_CHAIN_SOFTIRQ_CONTEXT] = "softirq", + [LOCK_CHAIN_SOFTIRQ_CONTEXT| + LOCK_CHAIN_HARDIRQ_CONTEXT] = "hardirq|softirq", + }; if (v == SEQ_START_TOKEN) { if (nr_chain_hlocks > MAX_LOCKDEP_CHAIN_HLOCKS) @@ -136,7 +143,7 @@ static int lc_show(struct seq_file *m, void *v) return 0; } - seq_printf(m, "irq_context: %d\n", chain->irq_context); + seq_printf(m, "irq_context: %s\n", irq_strs[chain->irq_context]); for (i = 0; i < chain->depth; i++) { class = lock_chain_get_class(chain, i); |