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[PATCH V7 16/29] hostmem-memfd: cpr for memory-backend-memfd
From: |
Steve Sistare |
Subject: |
[PATCH V7 16/29] hostmem-memfd: cpr for memory-backend-memfd |
Date: |
Wed, 22 Dec 2021 11:05:21 -0800 |
Preserve memory-backend-memfd memory objects during cpr.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
backends/hostmem-memfd.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c
index 3fc85c3..5097a05 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.h"
#include "qemu/module.h"
#include "qapi/error.h"
#include "qom/object.h"
@@ -36,23 +37,25 @@ memfd_backend_memory_alloc(HostMemoryBackend *backend,
Error **errp)
{
HostMemoryBackendMemfd *m = MEMORY_BACKEND_MEMFD(backend);
uint32_t ram_flags;
- char *name;
- int fd;
+ 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,
--
1.8.3.1
- [PATCH V7 05/29] vl: start on wakeup request, (continued)
- [PATCH V7 05/29] vl: start on wakeup request, Steve Sistare, 2021/12/22
- [PATCH V7 01/29] memory: qemu_check_ram_volatile, Steve Sistare, 2021/12/22
- [PATCH V7 04/29] migration: simplify savevm, Steve Sistare, 2021/12/22
- [PATCH V7 13/29] cpr: preserve extra state, Steve Sistare, 2021/12/22
- [PATCH V7 15/29] cpr: restart HMP interfaces, Steve Sistare, 2021/12/22
- [PATCH V7 17/29] pci: export functions for cpr, Steve Sistare, 2021/12/22
- [PATCH V7 20/29] vfio-pci: cpr part 2 (msi), Steve Sistare, 2021/12/22
- [PATCH V7 19/29] vfio-pci: cpr part 1 (fd and dma), Steve Sistare, 2021/12/22
- [PATCH V7 16/29] hostmem-memfd: cpr for memory-backend-memfd,
Steve Sistare <=
- [PATCH V7 14/29] cpr: restart mode, Steve Sistare, 2021/12/22
- [PATCH V7 18/29] vfio-pci: refactor for cpr, Steve Sistare, 2021/12/22
- [PATCH V7 25/29] chardev: cpr framework, Steve Sistare, 2021/12/22
- [PATCH V7 26/29] chardev: cpr for simple devices, Steve Sistare, 2021/12/22
- [PATCH V7 29/29] cpr: only-cpr-capable option, Steve Sistare, 2021/12/22
- [PATCH V7 21/29] vfio-pci: cpr part 3 (intx), Steve Sistare, 2021/12/22
- [PATCH V7 22/29] vfio-pci: recover from unmap-all-vaddr failure, Steve Sistare, 2021/12/22
- [PATCH V7 24/29] loader: suppress rom_reset during cpr, Steve Sistare, 2021/12/22
- [PATCH V7 23/29] vhost: reset vhost devices for cpr, Steve Sistare, 2021/12/22
- [PATCH V7 27/29] chardev: cpr for pty, Steve Sistare, 2021/12/22