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| author |   Janosch Frank <frankja@linux.vnet.ibm.com> | 2017-03-02 15:23:42 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-03-02 17:17:16 +0100 |
| commit | 2e4d88009f57057df7672fa69a32b5224af54d37 (patch) | |
| tree | 06e098c4ba6b3f091a3262b60ff562069f73ee11 /arch/s390/include/uapi | |
| parent | s390/ipl: always use load normal for CCW-type re-IPL (diff) | |
| download | linux-dev-2e4d88009f57057df7672fa69a32b5224af54d37.tar.xz linux-dev-2e4d88009f57057df7672fa69a32b5224af54d37.zip | |
KVM: s390: Fix guest migration for huge guests resulting in panic
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.")
Cc: <stable@vger.kernel.org> # 3.16+
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>
Diffstat (limited to 'arch/s390/include/uapi')
0 files changed, 0 insertions, 0 deletions