[libvirt RFC] qemu_saveimage: only use wrapper when using --bypass-cache
align the "save" with the "restore" code,
by only using the wrapper when using --bypass-cache.
This avoids a copy, resulting in better performance.
Signed-off-by: Claudio Fontana <cfontana(a)suse.de>
---
src/qemu/qemu_saveimage.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/qemu/qemu_saveimage.c b/src/qemu/qemu_saveimage.c
index 4fd4c5cfcd..5ea1b2fbcc 100644
--- a/src/qemu/qemu_saveimage.c
+++ b/src/qemu/qemu_saveimage.c
@@ -289,8 +289,10 @@ qemuSaveImageCreate(virQEMUDriver *driver,
if (qemuSecuritySetImageFDLabel(driver->securityManager, vm->def, fd) < 0)
goto cleanup;
- if (!(wrapperFd = virFileWrapperFdNew(&fd, path, wrapperFlags)))
- goto cleanup;
+ if ((flags & VIR_DOMAIN_SAVE_BYPASS_CACHE)) {
+ if (!(wrapperFd = virFileWrapperFdNew(&fd, path, wrapperFlags)))
+ goto cleanup;
+ }
if (virQEMUSaveDataWrite(data, fd, path) < 0)
goto cleanup;
--
2.34.1