Ubuntu
linux-kvm package

  1. Bionic (18.04)
  2. Bug #1760650
  3. Comment #3

Comment 3 for bug 1760650

Revision history for this message
Steve Beattie (sbeattie) wrote :

Hi, this looks to be a legit bug in how the linux-kvm kernel is derived from the generic kernel. Examining the annotations file in the linux-kvm master-next tree:

  https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-kvm/tree/debian.master/config/annotations?h=master-next#n9480

we can see that CONFIG_DEFAULT_MMAP_MIN_ADDR is supposed to be set to 65536 for amd64, etc. However, the generated config for the linux-kvm kernel contains CONFIG_DEFAULT_MMAP_MIN_ADDR=4096:

  https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-kvm/tree/debian.kvm/config/config.common.ubuntu?h=master-next#n532

So something has gone wrong in generating the linux-kvm kernel.

Thanks.