[Qemu-devel] [PATCH v3] arch_init/ram_load: add error message for block length mismatch

[Alon Levy]

Makes it easier to debug situations where the source and target have
different ram blocks in a device and migration fails due to that, for
instance a BAR size change on a PCI device.

Signed-off-by: Alon Levy <address@hidden>
---
v3: use RAM_ADDR_FMT

 arch_init.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch_init.c b/arch_init.c
index 49c5dc2..cd27fcf 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -808,6 +808,9 @@ static int ram_load(QEMUFile *f, void *opaque, int 
version_id)
                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
                         if (!strncmp(id, block->idstr, sizeof(id))) {
                             if (block->length != length) {
+                                fprintf(stderr, "Length mismatch: %s: %ld "
+                                        "in != " RAM_ADDR_FMT "\n", id, length,
+                                        block->length);
                                 ret =  -EINVAL;
                                 goto done;
                             }
-- 
1.8.2.1