Messages in this thread Patch in this message | | | Date | Tue, 11 Feb 2020 12:48:25 -0000 | From | "tip-bot2 for Waiman Long" <> | Subject | [tip: locking/core] locking/lockdep: Display irq_context names in /proc/lockdep_chains |
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The following commit has been merged into the locking/core branch of tip:
Commit-ID: b9875e9882295749a14b31e16dd504ae904cf070 Gitweb: https://git.kernel.org/tip/b9875e9882295749a14b31e16dd504ae904cf070 Author: Waiman Long <longman@redhat.com> AuthorDate: Thu, 06 Feb 2020 10:24:04 -05:00 Committer: Ingo Molnar <mingo@kernel.org> CommitterDate: Tue, 11 Feb 2020 13:10:48 +01:00
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 --- kernel/locking/lockdep_proc.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/kernel/locking/lockdep_proc.c b/kernel/locking/lockdep_proc.c index 231684c..c222438 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);
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