[Xen-devel] [PATCH 4/6] trace: adjust printk()s

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

They should be lower level or rate limited.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- 2010-06-15.orig/xen/common/trace.c  2010-06-28 11:58:37.000000000 +0200
+++ 2010-06-15/xen/common/trace.c       2010-06-29 17:04:45.000000000 +0200
@@ -120,7 +120,7 @@ static int alloc_trace_bufs(void)
     }
 
     t_info->tbuf_size = opt_tbuf_size;
-    printk("tbuf_size %d\n", t_info->tbuf_size);
+    printk(XENLOG_INFO "tbuf_size %d\n", t_info->tbuf_size);
 
     nr_pages = opt_tbuf_size;
     order = get_order_from_pages(nr_pages);
@@ -177,7 +177,7 @@ static int alloc_trace_bufs(void)
             /* Write list first, then write per-cpu offset. */
             wmb();
             t_info->mfn_offset[cpu]=offset;
-            printk("p%d mfn %"PRIx32" offset %d\n",
+            printk(XENLOG_INFO "p%d mfn %"PRIx32" offset %d\n",
                    cpu, mfn, offset);
             offset+=i;
         }
@@ -481,12 +481,13 @@ static inline int __insert_record(struct
     /* Double-check once more that we have enough space.
      * Don't bugcheck here, in case the userland tool is doing
      * something stupid. */
-    if ( calc_bytes_avail(buf) < rec_size )
+    next = calc_bytes_avail(buf);
+    if ( next < rec_size )
     {
-        printk("%s: %u bytes left (%u - ((%u - %u) %% %u) recsize %u.\n",
-               __func__,
-               calc_bytes_avail(buf),
-               data_size, buf->prod, buf->cons, data_size, rec_size);
+        if ( printk_ratelimit() )
+            printk(XENLOG_WARNING
+                   "%s: avail=%u (size=%08x prod=%08x cons=%08x) rec=%u\n",
+                   __func__, next, data_size, buf->prod, buf->cons, rec_size);
         return 0;
     }
     rmb();

trace-printk.patch
Description: Text document

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