| commit | 1a0e4c8b02ea510508970c333ee610a90b921cbb | |
| author | Christian Borntraeger <borntraeger@de.ibm.com> | |
| Tue, 24 Jan 2017 21:17:47 +0000 (24 22:17 +0100) | ||
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | |
| Wed, 1 Feb 2017 08:11:56 +0000 (1 09:11 +0100) | ||
| tree | 6fecd57c83ede741b25891e994ec37da4f27cdbf | treesnapshot (tar.gz zip) |
| parent | 2034ee5152ded8ef102f2e9dfcada7f91ecc7d66 | commitdiff |
s390x/kvm: fix small race reboot vs. cmma
Right now we reset all devices before we reset the cmma states. This
can result in the host kernel discarding guest pages that were
previously in the unused state but already contain a bios or a -kernel
file before the cmma reset has finished. This race results in random
guest crashes or hangs during very early reboot.
Fixes: 1cd4e0f6f0a6 ("s390x/cmma: clean up cmma reset")
Cc: qemu-stable@nongnu.org
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Right now we reset all devices before we reset the cmma states. This
can result in the host kernel discarding guest pages that were
previously in the unused state but already contain a bios or a -kernel
file before the cmma reset has finished. This race results in random
guest crashes or hangs during very early reboot.
Fixes: 1cd4e0f6f0a6 ("s390x/cmma: clean up cmma reset")
Cc: qemu-stable@nongnu.org
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| hw/s390x/s390-virtio.c | diffblobblamehistory |