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| author | Janosch Frank <frankja@linux.vnet.ibm.com> | 2017-03-02 14:23:42 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-18 11:14:34 (GMT) |
| commit | 9d89c20f3b8f82ddb1d7ef63748ad74691549e80 (patch) | |
| tree | f20e87391c5a60fd9dc91e6d17197618c8f1e2cb /virt | |
| parent | ce8ab5f168f654101ecba3f4443b12d4afdee841 (diff) | |
| download | linux-9d89c20f3b8f82ddb1d7ef63748ad74691549e80.tar.xz | |
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions