From: Laurent Vivier <lvivier@redhat.com>
Date: Mon, 21 Sep 2020 14:49:57 +0000 (+0200)
Subject: migration: increase max-bandwidth to 128 MiB/s (1 Gib/s)
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7590a2ae091fde8bb72d5df93977ab9707e23242;p=qemu.git

migration: increase max-bandwidth to 128 MiB/s (1 Gib/s)

max-bandwidth is set by default to 32 MiB/s (256 Mib/s)
since 2008 (5bb7910af031c).

Most of the CPUs can dirty memory faster than that now,
and this is clearly a problem with POWER where the page
size is 64 kiB and not 4 KiB.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20200921144957.979989-1-lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---

diff --git a/migration/migration.c b/migration/migration.c
index 827f8be07d..de34c995af 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -57,7 +57,7 @@
 #include "qemu/queue.h"
 #include "multifd.h"
 
-#define MAX_THROTTLE  (32 << 20)      /* Migration transfer speed throttling */
+#define MAX_THROTTLE  (128 << 20)      /* Migration transfer speed throttling */
 
 /* Amount of time to allocate to each "chunk" of bandwidth-throttled
  * data. */