From 0ad30983a09bdd00a6dd5e088126995ccbde8efb Mon Sep 17 00:00:00 2001 From: Dominik Csapak Date: Fri, 22 Feb 2019 11:38:34 +0100 Subject: [PATCH] add ivshmem documentation Signed-off-by: Dominik Csapak --- 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. +[[qm_ivshmem]] +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 -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. + [[qm_startup_and_shutdown]] Automatic Start and Shutdown of Virtual Machines ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- 2.39.2