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hostmem: introduce "prealloc-threads" property

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the property will allow user to specify number of threads to use
in pre-allocation stage. It also will allow to reduce implicit
hostmem dependency on current_machine.
On object creation it will default to 1, but via machine
compat property it will be updated to MachineState::smp::cpus
to keep current behavior for hostmem and main RAM (which is
now also hostmem based).

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200219160953.13771-77-imammedo@redhat.com>
This commit is contained in:
Igor Mammedov 2020-02-19 11:09:50 -05:00 • committed by Patchew Importer
parent 8b38de9f62
commit ffac16fab3
3 changed files with 51 additions and 8 deletions
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2
include/sysemu/hostmem.h
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@ -61,6 +61,7 @@ struct HostMemoryBackendClass {
* @parent: opaque parent object container
* @size: amount of memory backend provides
* @mr: MemoryRegion representing host memory belonging to backend
* @prealloc_threads: number of threads to be used for preallocatining RAM
*/
struct HostMemoryBackend {
/* private */
@ -70,6 +71,7 @@ struct HostMemoryBackend {
uint64_t size;
bool merge, dump, use_canonical_path;
bool prealloc, force_prealloc, is_mapped, share;
uint32_t prealloc_threads;
DECLARE_BITMAP(host_nodes, MAX_NODES + 1);
HostMemPolicy policy;