Re: [PATCH v10 04/14] unwind_user/deferred: Add unwind_deferred_trace()

From
Peter Zijlstra <peterz@infradead.org>
Date
2025-06-18 14:01:18
Also in
bpf, lkml
Reply to
Steven Rostedt, 2025-06-11
On Tue, Jun 10, 2025 at 08:54:25PM -0400, Steven Rostedt wrote:

+#define UNWIND_MAX_ENTRIES 512
The reason this is 512 is so that you end up with a whole page below?
quoted hunk ↗ jump to hunk
+int unwind_deferred_trace(struct unwind_stacktrace *trace)
+{
+	struct unwind_task_info *info = &current->unwind_info;
+
+	/* Should always be called from faultable context */
+	might_fault();
+
+	if (current->flags & PF_EXITING)
+		return -EINVAL;
+
+	if (!info->entries) {
+		info->entries = kmalloc_array(UNWIND_MAX_ENTRIES, sizeof(long),
+					      GFP_KERNEL);
  






  

    
      Thread (79 messages)
      
        79 messages,
        6 authors,
        last reply 2025-06-24
      
    
    
      
      
      
    
  

  

  
  




    
  

  
    

      

        Keyboard shortcuts
      

      

        
          
hback out one level

          
jnext message in thread / next series-diff position

          
kprevious message in thread / previous series-diff position

          
ldrill in

          
Escclose help / fold thread tree

          
?toggle this help