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qemuBuildMemoryBackendProps: Prealloc mem for memfd backend

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If a domain was using hugepages through memory-backend-file or
via -mem-path, we would turn prealloc on. But we are not doing
that for memory-backend-memfd. Fix this, because we need QEMU to
fully allocate hugepages.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Michal Privoznik 2020-05-25 14:35:51 +02:00
parent 0217c5a6b4
commit a658a4bdf7
1 changed files with 7 additions and 4 deletions
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11
src/qemu/qemu_command.c
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@ -3098,10 +3098,13 @@ qemuBuildMemoryBackendProps(virJSONValuePtr *backendProps,
if (def->mem.source == VIR_DOMAIN_MEMORY_SOURCE_MEMFD) {
backendType = "memory-backend-memfd";
if (useHugepage &&
(virJSONValueObjectAdd(props, "b:hugetlb", useHugepage, NULL) < 0 ||
virJSONValueObjectAdd(props, "U:hugetlbsize", pagesize << 10, NULL) < 0)) {
return -1;
if (useHugepage) {
if (virJSONValueObjectAdd(props, "b:hugetlb", useHugepage, NULL) < 0 ||
virJSONValueObjectAdd(props, "U:hugetlbsize", pagesize << 10, NULL) < 0) {
return -1;
}
prealloc = true;
}
if (qemuBuildMemoryBackendPropsShare(props, memAccess) < 0)