[pve-devel] [PATCH docs v2 1/1] add ivshmem documentation

Dominik Csapak d.csapak at proxmox.com
Fri Feb 22 11:38:34 CET 2019

Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
 qm.adoc | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/qm.adoc b/qm.adoc
index 30e473f..77fec98 100644
--- a/qm.adoc
+++ b/qm.adoc
@@ -703,6 +703,25 @@ you need to set the client resolution in the OVMF menu(which you can reach
 with a press of the ESC button during boot), or you have to choose
 SPICE as the display type.
+Inter-VM shared memory
+You can add a Inter-VM shared memory device (`ivshmem`) to be able to
+share memory between the host and a guest, or between multiple guests.
+To add such a device, you can use `qm`:
+  qm set <vmid> -ivshmem size=32,name=foo
+Where the size is in MiB. The file will be located under
+`/dev/shm/pve-shm-$name` (the default name is the vmid).
+A usecase for such a device is Looking Glass
+footnote:[Looking Glass: https://looking-glass.hostfission.com/]
+which enables high performance, low-latency display mirroring between
+host and guest.
 Automatic Start and Shutdown of Virtual Machines

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