ShuriZma
/
xemu
mirror of https://github.com/xemu-project/xemu.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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: 1cd4e0f6f0 ("s390x/cmma: clean up cmma reset")
Cc: qemu-stable@nongnu.org
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2017-01-24 22:17:47 +01:00
parent 2034ee5152
commit 1a0e4c8b02
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
hw/s390x/s390-virtio.c
View File

@ -204,8 +204,8 @@ void s390_machine_reset(void)
{
S390CPU *ipl_cpu = S390_CPU(qemu_get_cpu(0));
qemu_devices_reset();
s390_cmma_reset();
qemu_devices_reset();
s390_crypto_reset();
/* all cpus are stopped - configure and start the ipl cpu only */