[Bug 1864984] [NEW] "nr_entries is too big" when using virgl

[Valentin David]

Public bug reported:

I have a bootable image where GNOME Shell fails because it hits a limit
in virtio-gpu.

In `hw/display/virtio-gpu.c`, there is a limit for `nr_entries` at
16384. There is no explanation for that limit. But there does not seem
to be any limit on the kernel side.

Raising this limit with a patch to 262144 solves the issue.

Could there be an explanation why this limit is needed? And why this
value? Or could this limit be just removed?

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1864984

Title:
  "nr_entries is too big" when using virgl

Status in QEMU:
  New

Bug description:
  I have a bootable image where GNOME Shell fails because it hits a
  limit in virtio-gpu.

  In `hw/display/virtio-gpu.c`, there is a limit for `nr_entries` at
  16384. There is no explanation for that limit. But there does not seem
  to be any limit on the kernel side.

  Raising this limit with a patch to 262144 solves the issue.

  Could there be an explanation why this limit is needed? And why this
  value? Or could this limit be just removed?

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