[PATCH v20210701 03/40] xl: fix description of migrate --debug

[Olaf Hering <olaf@xxxxxxxxx>]

xl migrate --debug used to track every pfn in every batch of pages.
But these times are gone. The code in xc_domain_save is the consumer
of this knob, but it considers it only for the remus and colo case.

Adjust the help text to tell what --debug does today: Nothing.

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>

v02:
- the option has no effect anymore
---
 docs/man/xl.1.pod.in   | 2 +-
 tools/xl/xl_cmdtable.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/man/xl.1.pod.in b/docs/man/xl.1.pod.in
index e2176bd696..70a6ebf438 100644
--- a/docs/man/xl.1.pod.in
+++ b/docs/man/xl.1.pod.in
@@ -481,7 +481,7 @@ domain.
 
 =item B<--debug>
 
-Display huge (!) amount of debug information during the migration process.
+This option has no effect. It is preserved for compatibility reasons.
 
 =item B<-p>
 
diff --git a/tools/xl/xl_cmdtable.c b/tools/xl/xl_cmdtable.c
index 661323d488..ca1dfa3525 100644
--- a/tools/xl/xl_cmdtable.c
+++ b/tools/xl/xl_cmdtable.c
@@ -172,7 +172,7 @@ const struct cmd_spec cmd_table[] = {
       "                migrate-receive [-d -e]\n"
       "-e              Do not wait in the background (on <host>) for the 
death\n"
       "                of the domain.\n"
-      "--debug         Print huge (!) amount of debug during the migration 
process.\n"
+      "--debug         Ignored.\n"
       "-p              Do not unpause domain after migrating it.\n"
       "-D              Preserve the domain id"
     },