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[PATCH V9 27/46] hostmem-memfd: cpr support
From: |
Steve Sistare |
Subject: |
[PATCH V9 27/46] hostmem-memfd: cpr support |
Date: |
Tue, 26 Jul 2022 09:10:24 -0700 |
Preserve memory-backend-memfd memory objects during cpr.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
backends/hostmem-memfd.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c
index 3fc85c3..d421a4f 100644
--- a/backends/hostmem-memfd.c
+++ b/backends/hostmem-memfd.c
@@ -14,6 +14,7 @@
#include "sysemu/hostmem.h"
#include "qom/object_interfaces.h"
#include "qemu/memfd.h"
+#include "migration/cpr-state.h"
#include "qemu/module.h"
#include "qapi/error.h"
#include "qom/object.h"
@@ -36,28 +37,29 @@ memfd_backend_memory_alloc(HostMemoryBackend *backend,
Error **errp)
{
HostMemoryBackendMemfd *m = MEMORY_BACKEND_MEMFD(backend);
uint32_t ram_flags;
- char *name;
- int fd;
+ g_autofree char *name = host_memory_backend_get_name(backend);
+ int fd = cpr_find_fd(name, 0);
if (!backend->size) {
error_setg(errp, "can't create backend with size 0");
return;
}
- fd = qemu_memfd_create(TYPE_MEMORY_BACKEND_MEMFD, backend->size,
- m->hugetlb, m->hugetlbsize, m->seal ?
- F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL : 0,
- errp);
- if (fd == -1) {
- return;
+ if (fd < 0) {
+ fd = qemu_memfd_create(TYPE_MEMORY_BACKEND_MEMFD, backend->size,
+ m->hugetlb, m->hugetlbsize, m->seal ?
+ F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL : 0,
+ errp);
+ if (fd == -1) {
+ return;
+ }
+ cpr_save_fd(name, 0, fd);
}
- name = host_memory_backend_get_name(backend);
ram_flags = backend->share ? RAM_SHARED : 0;
ram_flags |= backend->reserve ? 0 : RAM_NORESERVE;
memory_region_init_ram_from_fd(&backend->mr, OBJECT(backend), name,
backend->size, ram_flags, fd, 0, errp);
- g_free(name);
}
static bool
--
1.8.3.1
- [PATCH V9 03/46] migration: file URI, (continued)
- [PATCH V9 03/46] migration: file URI, Steve Sistare, 2022/07/26
- [PATCH V9 02/46] memory: RAM_NAMED_FILE flag, Steve Sistare, 2022/07/26
- [PATCH V9 01/46] migration: fix populate_vfio_info, Steve Sistare, 2022/07/26
- [PATCH V9 14/46] qapi: strList unit tests, Steve Sistare, 2022/07/26
- [PATCH V9 13/46] qapi: strv_from_strList, Steve Sistare, 2022/07/26
- [PATCH V9 18/46] memory: flat section iterator, Steve Sistare, 2022/07/26
- [PATCH V9 04/46] migration: mode parameter, Steve Sistare, 2022/07/26
- [PATCH V9 21/46] cpr: preserve extra state, Steve Sistare, 2022/07/26
- [PATCH V9 19/46] oslib: qemu_clear_cloexec, Steve Sistare, 2022/07/26
- [PATCH V9 30/46] vfio-pci: refactor for cpr, Steve Sistare, 2022/07/26
- [PATCH V9 27/46] hostmem-memfd: cpr support,
Steve Sistare <=
- [PATCH V9 25/46] cpr: only-cpr-capable, Steve Sistare, 2022/07/26
- [PATCH V9 20/46] vl: helper to request re-exec, Steve Sistare, 2022/07/26
- [PATCH V9 05/46] migration: migrate-enable-mode option, Steve Sistare, 2022/07/26
- [PATCH V9 24/46] cpr: ram block blockers, Steve Sistare, 2022/07/26
- [PATCH V9 08/46] cpr: relax some blockers, Steve Sistare, 2022/07/26
- [PATCH V9 28/46] hostmem-epc: cpr support, Steve Sistare, 2022/07/26
- [PATCH V9 33/46] vfio-pci: cpr part 3 (intx), Steve Sistare, 2022/07/26
- [PATCH V9 06/46] migration: simplify blockers, Steve Sistare, 2022/07/26
- [PATCH V9 10/46] qdev-properties: strList, Steve Sistare, 2022/07/26
- [PATCH V9 29/46] pci: export msix_is_pending, Steve Sistare, 2022/07/26