Remove trace_buf_size and trace_event from the kernel bootparameters of the kdump kernel

The kdump kernel uses resources for ftrace because trace_buf_size, which
specifies the ring buffer size for ftrace, and trace_event, which specifies
a valid trace event, are not removed, but the kdump kernel does not require
ftrace.

trace_buf_size is ignored if the specified size is 0, so specify 1.

Signed-off-by: Hisashi Nagaoka <fj1508ic@fujitsu.com>
Acked-by: Kairui Song <kasong@redhat.com>

kdump-lib.sh

@@ -821,6 +821,10 @@ prepare_cmdline()
         fi
     done
 
+    # Remove trace_buf_size, trace_event
+    cmdline=$(remove_cmdline_param "$cmdline" trace_buf_size trace_event)
+    cmdline="${cmdline} trace_buf_size=1"
+
     echo ${cmdline}
 }