Preallocation in memory backends can be specified with either global
QEMU option "-mem-prealloc", or with per-backend property
"prealloc=true". In the latter case, however, the default for the
number of preallocation threads is not set to the number of vcpus, but
remains at 1 instead.
Fix it by setting the "prealloc-threads" sugar property of
"memory-backend" to the number of vcpus unconditionally.
Fixes: ffac16fab3 ("hostmem: introduce "prealloc-threads" property")
Signed-off-by: Denis Plotnikov <den-plotni...@yandex-team.ru>
---
softmmu/vl.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/softmmu/vl.c b/softmmu/vl.c
index ff488ea3e7db..e392e226a2d3 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -2300,14 +2300,17 @@ static void qemu_validate_options(void)
static void qemu_process_sugar_options(void)
{
- if (mem_prealloc) {
- char *val;
+ char *val;
- val = g_strdup_printf("%d",
- (uint32_t)
qemu_opt_get_number(qemu_find_opts_singleton("smp-opts"), "cpus", 1));
- object_register_sugar_prop("memory-backend", "prealloc-threads", val,
- false);
- g_free(val);
+ val = g_strdup_printf("%d",
+ (uint32_t) qemu_opt_get_number(
+ qemu_find_opts_singleton("smp-opts"), "cpus", 1));
+
+ object_register_sugar_prop("memory-backend", "prealloc-threads", val,
+ false);
+ g_free(val);
+
+ if (mem_prealloc) {
object_register_sugar_prop("memory-backend", "prealloc", "on", false);
}
--
2.25.1
