Ubuntu
linux package

  1. Bionic (18.04)
  2. Bug #1836153
  3. Comment #6

Comment 6 for bug 1836153

Revision history for this message
bugproxy (bugproxy) wrote : Comment bridged from LTC Bugzilla

------- Comment From <email address hidden> 2019-07-26 03:12 EDT-------
I can confirm that the KVM part (this bugzilla) works fine with
a. this kernel from proposed
b. qemu from https://launchpad.net/~paelzer/+archive/ubuntu/bug-1836154-s390x-hwmodels/+packages

Now. The kernel in proposed has a bug which prohibits this kernel to be released.

dmesg is flooded with
[ 417.945769] BUG: non-zero pgtables_bytes on freeing mm: -16384
[ 417.951747] BUG: non-zero pgtables_bytes on freeing mm: -16384
[ 417.955339] BUG: non-zero pgtables_bytes on freeing mm: -16384
[ 417.960318] BUG: non-zero pgtables_bytes on freeing mm: -16384
[ 417.961260] BUG: non-zero pgtables_bytes on freeing mm: -16384
[ 422.248440] BUG: non-zero pgtables_bytes on freeing mm: -16384
[ 430.012698] BUG: non-zero pgtables_bytes on freeing mm: -16384
[ 434.051283] BUG: non-zero pgtables_bytes on freeing mm: -16384
[ 526.865193] BUG: non-zero pgtables_bytes on freeing mm: -16384
[ 526.873399] BUG: non-zero pgtables_bytes on freeing mm: -16384

messages. Looks like you picked an upstream patch and missed several followup patches in that area.
Thjis is around commit e12e4044aede97974f2222eb7f0ed726a5179a32 ("s390/mm: fix mis-accounting of pgtable_bytes") and later patches on top of this.

(This is independent from the KVM changes which are working perfectly fine).