doc: fix log level example in Linux guide

Now we need to add prefix like lib. to enable the log,
also changing val 8 to "debug"" which would be more descriptive.

Fixes: ffb9fd1b0808 ("log: update legacy modules dynamic logs regex")
Cc: stable@dpdk.org
Reported-by: Haiyue Wang <haiyue.wang@intel.com>
Signed-off-by: Xiaolong Ye <xiaolong.ye@intel.com>

diff --git a/doc/guides/linux_gsg/eal_args.include.rst b/doc/guides/linux_gsg/eal_args.include.rst
index 361c7cf..711a246 100644 (file)
--- a/doc/guides/linux_gsg/eal_args.include.rst
+++ b/doc/guides/linux_gsg/eal_args.include.rst
@@ -132,7 +132,7 @@ Debugging options
 
     Specify log level for a specific component. For example::
 
-        --log-level eal:8
+        --log-level lib.eal:debug
 
     Can be specified multiple times.