Il 24/07/2014 11:07, Igor Mammedov ha scritto: > Fixes migration regression from QEMU-1.7 to a newer QEMUs. > SSDT table size in QEMU-1.7 doesn't change regardless of > a number of PCI bridge devices present at startup. > > However in QEMU-2.0 since addition of hotplug on PCI bridges, > each PCI bridge adds ~1875 bytes to SSDT table, including > pc-i440fx-1.7 machine type where PCI bridge hotplug disabled > via compat property. > It breaks migration from "QEMU-1.7" to "QEMU-2.[01] -M pc-i440fx-1.7" > since RAMBlock size of ACPI tables on target becomes larger > then on source and migration fails with: > > "Length mismatch: /rom@etc/acpi/tables: 2000 in != 3000" > > error.
In principle, this definitely makes sense. With QEMU-2.0 and 2.0.1 out in the wild (and packaged into Ubuntu), however, it's difficult to decide whether to include this patch or not. I feel more like having downstreams include it if they skipped QEMU 2.0 and went straight from 1.7 to 2.1. Paolo
