Re: [libvirt] [PATCH v2 3/3] virQEMUDriverDomainABIStability: Check for memoryBacking

https://bugzilla.redhat.com/show_bug.cgi?id=1450349 Problem is, qemu fails to load guest memory image if these attribute change on migration/restore from an image.

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 35fd79de8..c1ff8ca8a 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -5797,6 +5797,46 @@ qemuDomainUpdateMemoryDeviceInfo(virQEMUDriverPtr driver, } +static bool +qemuDomainABIStabilityCheck(const virDomainDef *src, + const virDomainDef *dst) +{ + if (src->mem.source != dst->mem.source) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Target memoryBacking source '%s' doesn't " + "match source memoryBacking source'%s'"), + virDomainMemorySourceTypeToString(dst->mem.source), + virDomainMemorySourceTypeToString(src->mem.source)); + return false; + } + + if (src->mem.access != dst->mem.access) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Target memoryBacking access '%s' doesn't " + "match access memoryBacking access'%s'"), + virDomainMemoryAccessTypeToString(dst->mem.access), + virDomainMemoryAccessTypeToString(src->mem.access)); + return false; + } + + if (src->mem.allocation != dst->mem.allocation) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Target memoryBacking allocation '%s' doesn't " + "match allocation memoryBacking allocation'%s'"), + virDomainMemoryAllocationTypeToString(dst->mem.allocation), + virDomainMemoryAllocationTypeToString(src->mem.allocation)); + return false; + }