Avi Kivity wrote:
Dan Aloni wrote:
On Wed, Feb 20, 2008 at 11:09:44AM +0200, Avi Kivity wrote:
Dan Aloni wrote:
It happens at 100% of the times I invoke kexec.
Can you provide a commandline which triggers this? I'm completely
ignorant wrt kexec.
I managed to verify that this problem can be reproduced with the
2.6.16.60 tree.
Also, it's worth to note that with '-no-kvm' the kexec procedure works
successfully and the second kernel executes.
Please use the .config that that I attached to this mail, and also apply
the patch I supplied (it fixes a build problem that 2.6.16 has with the
newer binutils versions and x86_64). I use gcc-4.1.2 to build the kernel.
Once you have the bzImage of that guest kernel, use a root filesystem
and boot it straight into /bin/bash.
Now, assuming that your guest rootfs has kexec-utils package installed,
do the following:
mount -t proc proc /proc
kexec -l bzImage --command-line='ro root=/dev/hda1 init=/bin/bash'
kexec -e
BTW, if you use the serial console with the '-nographic' switch, then
you might want to use kexec a little differently:
kexec -l bzImage --command-line='ro root=/dev/hda1 init=/bin/bash console=ttyS0,115200' --serial=ttyS0 --serial-baud=115200
I managed to reproduce it (FC6 kernel kexecing itself). It is Intel
specific.
The attached patch fixes the problem for me.
--
error compiling committee.c: too many arguments to function
diff --git a/kernel/vmx.c b/kernel/vmx.c
index 7ce02d2..ccc8174 100644
--- a/kernel/vmx.c
+++ b/kernel/vmx.c
@@ -1356,6 +1356,7 @@ static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
msr->data = efer & ~EFER_LME;
}
+ vmx_load_host_state(vmx);
setup_msrs(vmx);
}
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