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Re: [Qemu-devel] Windows 10 guest hang during 'info mem'
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] Windows 10 guest hang during 'info mem' |
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Date: |
Fri, 24 Nov 2017 15:05:24 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 |
On 24/11/2017 13:57, Igor Mammedov wrote:
> I've stumbled on WS2016 hang when trying to list memory map in QEMU.
>
> Steps to reproduce:
> qemu-system-x86_64 -monitor stdio -enable-kvm -m 1G ws2016x64.img
> wait till guest boots and execute in monitor
> (qemu) info mem
>
> qemu will hang while printing mappings, consuming 100% cpu and not
> responding to ^C.
>
> I've also tried with old (2.8) and current qemu master and today's
> upstream kernel where it also doesn't work but WS2012R2x64 guest
> works just fine.
>
> PS:
> CCing KVM list as the issue happens only when KVM is enabled.
"info mem" code sucks and is unreadable. We really should rewrite the
MMU stuff in TCG. :(
But, what is the backtrace?
Paolo