File libxc-sr-xl-migration-debug.patch of Package xen

From: Olaf Hering <olaf@aepfle.de>
Date: Thu, 29 Oct 2020 17:00:19 +0100
Subject: libxc sr xl migration debug

xl: fix description of migrate --debug

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, now may enable verification mode.

Signed-off-by: Olaf Hering <olaf@aepfle.de>

v03:
- adjust to describe what --debug would do when the code which
  consumes this knob is fixed.
v02:
- the option has no effect anymore
---
 docs/man/xl.1.pod.in   |    4 +++-
 tools/xl/xl_cmdtable.c |    2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

--- a/docs/man/xl.1.pod.in
+++ b/docs/man/xl.1.pod.in
@@ -486,7 +486,9 @@ domain.
 
 =item B<--debug>
 
-Display huge (!) amount of debug information during the migration process.
+This enables verification mode, which will transfer the entire domU memory
+once more to the receiving host to make sure the content is identical on
+both sides.
 
 =item B<-p>
 
--- a/tools/xl/xl_cmdtable.c
+++ b/tools/xl/xl_cmdtable.c
@@ -173,7 +173,7 @@ 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         Enable verification mode.\n"
       "-p              Do not unpause domain after migrating it.\n"
       "-D              Preserve the domain id"
     },