Cache mode=passthrough can result in a broken cache topology if the domain topology is not exactly the same as the host topology. Warn about that in the documentation.
Bug report for reference: https://bugzilla.redhat.com/show_bug.cgi?id=1184125 Signed-off-by: Eduardo Habkost <[email protected]> --- docs/formatdomain.html.in | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 57ec2ff34..9c21892f3 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -1478,7 +1478,9 @@ <dt><code>passthrough</code></dt> <dd>The real CPU cache data reported by the host CPU will be - passed through to the virtual CPU.</dd> + passed through to the virtual CPU. Using this mode is not + recommended unless the domain CPU and NUMA topology is exactly + the same as the host CPU and NUMA topology.</dd> <dt><code>disable</code></dt> <dd>The virtual CPU will report no CPU cache of the specified -- 2.13.5 -- libvir-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/libvir-list
