Re: [libvirt] [PATCHv4 3/3] qemu: Add args generation for file memory backing

On Sat, Jan 28, 2017 at 03:03:16PM +0100, Michal Privoznik wrote: > On 13.12.2016 13:12, Jaroslav Safka wrote: > > This patch add support for file memory backing on numa topology. > > > > The specified access mode in memoryBacking can be overriden > > by specifying token memAccess in numa cell. > > --- > > src/qemu/qemu_command.c | 113 ++++++++++++++------- > > .../qemuxml2argv-fd-memory-no-numa-topology.args | 21 ++++ > > .../qemuxml2argv-fd-memory-no-numa-topology.xml | 27 +++++ > > .../qemuxml2argv-fd-memory-numa-topology.args | 24 +++++ > > .../qemuxml2argv-fd-memory-numa-topology.xml | 30 ++++++ > > .../qemuxml2argv-fd-memory-numa-topology2.args | 26 +++++ > > .../qemuxml2argv-fd-memory-numa-topology2.xml | 31 ++++++ > > .../qemuxml2argv-fd-memory-numa-topology3.args | 30 ++++++ > > .../qemuxml2argv-fd-memory-numa-topology3.xml | 32 ++++++ > > tests/qemuxml2argvtest.c | 12 ++- > > tests/qemuxml2xmltest.c | 1 - > > 11 files changed, 308 insertions(+), 39 deletions(-) > > create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-no-numa-topology.args > > create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-no-numa-topology.xml > > create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology.args > > create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology.xml > > create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology2.args > > create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology2.xml > > create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology3.args > > create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-fd-memory-numa-topology3.xml > > A lot of tests. Impressive. > > > > > diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c > > index 7d186d2..a897ed5 100644 > > --- a/src/qemu/qemu_command.c > > +++ b/src/qemu/qemu_command.c > > @@ -3315,15 +3315,11 @@ qemuBuildMemoryBackendStr(unsigned long long size, > > if (!(props = virJSONValueNewObject())) > > return -1; > > > > - if (pagesize) { > > - if (qemuGetDomainHupageMemPath(def, cfg, pagesize, &mem_path) < 0) > > - goto cleanup; > > - > > + if (def->mem.source == VIR_DOMAIN_MEMORY_SOURCE_FILE) { > > *backendType = "memory-backend-file"; > > > > if (virJSONValueObjectAdd(props, > > - "b:prealloc", true, > > - "s:mem-path", mem_path, > > + "s:mem-path", cfg->libDir, > > Really? cfg->libDir should stay intact. Should QEMU need to create a > file, something cfg->stateDir based is probably more suitable. Or even > some /tmp/ based path. Or am I misunderstanding something? You don't want multi-GB files created in /tmp, nor cfg->stateDir which is also on tmpfs