File 59a98d3e-libxc-increase-maximum-migration-stream-record-length.patch of Package xen.openSUSE_Leap_42.3_Update

Subject: libxc: increase maximum migration stream record length
From: Juergen Gross jgross@suse.com Thu Aug 10 13:24:28 2017 +0200
Date: Fri Sep 1 17:39:26 2017 +0100:
Git: e48e33e219a8b045170bdc78f2eb96408d320f2b

Today the maximum record lenth in a migration stream is 8MB. This
limits the size of a PV domain to a little bit less than 1TB in the
migration case, as the P2M frame list will exceed 8MB in this case.

Raising the record size limit by a factor of 16 allows for domain
sizes of nearly 16TB to be migrated. This ought to be enough.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/tools/libxc/xc_sr_stream_format.h b/tools/libxc/xc_sr_stream_format.h
index 3291b25..15ff1c7 100644
--- a/tools/libxc/xc_sr_stream_format.h
+++ b/tools/libxc/xc_sr_stream_format.h
@@ -57,8 +57,8 @@ struct xc_sr_rhdr
 
 /* All records must be aligned up to an 8 octet boundary */
 #define REC_ALIGN_ORDER               (3U)
-/* Somewhat arbitrary - 8MB */
-#define REC_LENGTH_MAX                (8U << 20)
+/* Somewhat arbitrary - 128MB */
+#define REC_LENGTH_MAX                (128U << 20)
 
 #define REC_TYPE_END                        0x00000000U
 #define REC_TYPE_PAGE_DATA                  0x00000001U