[PATCH v2 02/13] qemu_process: Deduplicate code in qemuProcessNeedHugepagesPath()
The aim of qemuProcessNeedHugepagesPath() is to return whether
guest needs private path inside HugeTLBFS mounts (deducted from
domain definition @def) or whether the memory device that user is
hotplugging in needs the private path (deducted from the @mem
argument). The actual creation of the path is done in the only
caller qemuProcessBuildDestroyMemoryPaths().
The rule for the first case (@def) and the second case (@mem) is
the same (domain has a DIMM device that has HP requested) and is
written twice. Move the logic into a function to deduplicate the
code.
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
---
src/qemu/qemu_process.c | 29 +++++++++++++++++++++++------
1 file changed, 23 insertions(+), 6 deletions(-)
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 30cfa4d485..03af80cb55 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -3872,6 +3872,27 @@ qemuProcessReconnectCheckMemAliasOrderMismatch(virDomainObjPtr vm)
}
+static bool
+qemuProcessDomainMemoryDefNeedHugepagesPath(const virDomainMemoryDef *mem,
+ const long system_pagesize)
+{
+ switch (mem->model) {
+ case VIR_DOMAIN_MEMORY_MODEL_DIMM:
+ return mem->pagesize &&
+ mem->pagesize != system_pagesize;
+
+ case VIR_DOMAIN_MEMORY_MODEL_NONE:
+ case VIR_DOMAIN_MEMORY_MODEL_NVDIMM:
+ case VIR_DOMAIN_MEMORY_MODEL_VIRTIO_PMEM:
+ case VIR_DOMAIN_MEMORY_MODEL_LAST:
+ /* None of these can be backed by hugepages. */
+ return false;
+ }
+
+ return false;
+}
+
+
static bool
qemuProcessNeedHugepagesPath(virDomainDefPtr def,
virDomainMemoryDefPtr mem)
@@ -3888,16 +3909,12 @@ qemuProcessNeedHugepagesPath(virDomainDefPtr def,
}
for (i = 0; i < def->nmems; i++) {
- if (def->mems[i]->model == VIR_DOMAIN_MEMORY_MODEL_DIMM &&
- def->mems[i]->pagesize &&
- def->mems[i]->pagesize != system_pagesize)
+ if (qemuProcessDomainMemoryDefNeedHugepagesPath(def->mems[i],
system_pagesize))
return true;
}
if (mem &&
- mem->model == VIR_DOMAIN_MEMORY_MODEL_DIMM &&
- mem->pagesize &&
- mem->pagesize != system_pagesize)
+ qemuProcessDomainMemoryDefNeedHugepagesPath(mem, system_pagesize))
return true;
return false;
--
2.26.2