Re: soft lockup in kvm_flush_remote_tlbs

david ahern
2007-10-25T23:05:00Z

It appears to be a problem with the kernel proper (ie., not a Red Hat patch). I hit the soft lockup problem with kvm-48 and the 2.6.18.4 kernel which is the base for RHEL5. That suggests a delivery between 2.6.18.4 (November 2006) and 2.6.23.1 fixed it.

david

Avi Kivity wrote:
> david ahern wrote:
>> The issue appears to be with the RHEL5 kernel (host OS is rhel5). I tried your suggestions below -- no effect; still hit the softlockup.
>>
>> I then moved the host to the 2.6.23.1 kernel but with the kvm-48 code base. Surprisingly, I had no issues starting my guest with '-smp 4'.
>>
>>
>
> Well, I regularly start up 4-way Linux guests on 2.6.bleeding.edge. I'd
> like to clear that problem for users on older kernels, though.