NuKVM/libvirt
3
0 Fork 0
mirror of https://github.com/libvirt/libvirt.git synced 2026-10-02 12:20:06 -05:00
Code Issues Packages Projects Releases Wiki Activity

qemu: raise an eror when using aio=native without cache=none

Browse Source 
Qemu will fallback to aio=threads when the cache mode doesn't use
O_DIRECT, even if aio=native was explictly set.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1086704

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano authored and Eric Blake committed 2014-07-08 15:27:10 -06:00
1 parent 0ea6512dfd
commit 058384003d
1 file changed
+10
Download Patch File Download Diff File Expand all files Collapse all files
src/qemu/qemu_command.c
+10
View File
@@ -3477,6 +3477,16 @@ qemuBuildDriveStr(virConnectPtr conn,
mode = qemuDiskCacheV1TypeToString(disk->cachemode);
}
if (disk->iomode == VIR_DOMAIN_DISK_IO_NATIVE &&
disk->cachemode != VIR_DOMAIN_DISK_CACHE_DIRECTSYNC &&
disk->cachemode != VIR_DOMAIN_DISK_CACHE_DISABLE) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("native I/O needs either no disk cache "
"or directsync cache mode, QEMU will fallback "
"to aio=threads"));
goto error;
}
virBufferAsprintf(&opt, ",cache=%s", mode);
} else if (disk->src->shared && !disk->src->readonly) {
virBufferAddLit(&opt, ",cache=off");