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From: | Paolo Bonzini |
Subject: | Re: [Qemu-devel] x86_64 linux kernel doesn't boot with -icount enabled |
Date: | Thu, 10 Nov 2011 12:25:40 +0100 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110930 Thunderbird/7.0.1 |
On 11/10/2011 11:25 AM, Max Filippov wrote:
> > -icount should be ignored or give an error together with KVM. Would youWhat's the background for that? (Unfortunately I'm completely unfamiliar with kvm).
With -icount, The vm_clock is updated with help from TCG (it counts instructions at 2^ICOUNT ns/instructions). With KVM, the instruction count is not available so KVM cannot provide this help.
The patch you sent looks good, but perhaps you can include the above comment in the commit message and also include Xen? With these changes, you can add my Acked-by.
Thanks, Paolo
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