hujun260 commented on code in PR #14578:
URL: https://github.com/apache/nuttx/pull/14578#discussion_r1858064950


##########
sched/sched/sched_unlock.c:
##########
@@ -37,281 +37,178 @@
 #include "sched/sched.h"
 
 /****************************************************************************
- * Public Functions
+ * Private Data
  ****************************************************************************/
 
+#if defined(CONFIG_SCHED_TICKLESS) && \
+           (CONFIG_RR_INTERVAL > 0 || defined(CONFIG_SCHED_SPORADIC))
+static int preempt_schedule_nestcount = 0;

Review Comment:
   Because we have placed sched_lock inside spin_lock_irqsave,
   and spin_lock_irqsave is also extensively used to replace critical sections,
   the usage of sched_lock has become very widespread, which makes recursion 
highly likely to occur.



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