Maximum frame size of N bytes excceds maximum space available

Software & Operating Systems Looking Glass
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1

I’m sure this is a noob issue…but everything was working fine, until I tried to automate the looking glass host startup. Now I’m getting the following error:

Maximum frame size of 8294400 bytes excceds maximum space available

What’s really weird is that I’ve downloaded a fresh copy of B1, but the log file is showing B1-rc6-6-gb979752989+1 (which I did download and run once after it started breaking).

I’m at the point were I’m going to reload the VM, because this doesn’t make sense to me…

2

The IVSHMEM virtual device shared memory is not large enough.

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3

Thanks, okay so what happened was that I configured shmem for scream and looking-glass with this config:

<shmem name='looking-glass'>
  <model type='ivshmem-plain'/>
  <size unit='M'>32</size>
  <address type='pci' domain='0x0000' bus='0x06' slot='0x01' function='0x0'/>
</shmem>
<shmem name='scream-ivshmem'>
  <model type='ivshmem-plain'/>
  <size unit='M'>2</size>
  <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
</shmem>

And the lg host ended up using scream-ivshmem which is only 2MB.

4

Bonus: how do I control the enumeration of the shm devices and stop lg from using the scream one?

5

The LG host application accepts a parameter to tell it which device by index.

looking-glass-host.exe os:shmDevice=N where N is the index.

1 Like