diff options
| author | Janosch Frank <frankja@linux.vnet.ibm.com> | 2017-03-02 15:23:42 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-07-18 18:40:06 +0100 |
| commit | 6be3b43d573a11781b9eb1a3079bce3e2a916fdf (patch) | |
| tree | 2efc7d3bdc201858d46a2a40ca5c0a17753a23fb /include/trace | |
| parent | 9b3026f294590f8a88fa730b366caa44ab357b6c (diff) | |
KVM: s390: Fix guest migration for huge guests resulting in panic
commit 2e4d88009f57057df7672fa69a32b5224af54d37 upstream.
While we can technically not run huge page guests right now, we can
setup a guest with huge pages. Trying to migrate it will trigger a
VM_BUG_ON and, if the kernel is not configured to panic on a BUG, it
will happily try to work on non-existing page table entries.
With this patch, we always return "dirty" if we encounter a large page
when migrating. This at least fixes the immediate problem until we
have proper handling for both kind of pages.
Fixes: 15f36eb ("KVM: s390: Add proper dirty bitmap support to S390 kvm.")
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
[bwh: Backported to 3.16:
- Use respectively gmap->mm, address and pte instead of mm, addr and ptep
- Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/trace')
0 files changed, 0 insertions, 0 deletions