X-Git-Url: https://git.proxmox.com/?p=pve-docs.git;a=blobdiff_plain;f=qm.adoc;h=4f9ae15f9710102bbae15da40154fc733d0f75a7;hp=43f250a4d7c7875f526cbd5743a45bf22b04fcd7;hb=00821894522d1afca5cedbb34bb8e20992bd7161;hpb=730fbca4088e08f5fe9b985d9115ecb292dced49

diff --git a/qm.adoc b/qm.adoc
index 43f250a..4f9ae15 100644
--- a/qm.adoc
+++ b/qm.adoc
@@ -484,7 +484,7 @@ host.
 .Fixed Memory Allocation
 [thumbnail="screenshot/gui-create-vm-memory.png"]
 
-When setting memory and minimum memory to the same amount
+ghen setting memory and minimum memory to the same amount
 {pve} will simply allocate what you specify to your VM.
 
 Even when using a fixed memory size, the ballooning device gets added to the
@@ -703,6 +703,29 @@ 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 an Inter-VM shared memory device (`ivshmem`), which allows one to
+share memory between the host and a guest, or also 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).
+
+NOTE: Currently the device will get deleted as soon as any VM using it got
+shutdown or stopped. Open connections will still persist, but new connections
+to the exact same device cannot be made anymore.
+
+A use case for such a device is the Looking Glass
+footnote:[Looking Glass: https://looking-glass.hostfission.com/] project,
+which enables high performance, low-latency display mirroring between
+host and guest.
+
 [[qm_startup_and_shutdown]]
 Automatic Start and Shutdown of Virtual Machines
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -1030,6 +1053,16 @@ ifndef::wiki[]
 include::qm-pci-passthrough.adoc[]
 endif::wiki[]
 
+Hookscripts
+~~~~~~~~~~~
+
+You can add a hook script to VMs with the config property `hookscript`.
+
+ qm set 100 -hookscript local:snippets/hookscript.pl
+
+It will be called during various phases of the guests lifetime.
+For an example and documentation see the example script under
+`/usr/share/pve-docs/examples/guest-example-hookscript.pl`.
 
 Managing Virtual Machines with `qm`
 ------------------------------------