[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for I
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE |
Date: |
Thu, 16 Jun 2016 19:40:20 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0 |
On 16/06/2016 19:36, Eduardo Habkost wrote:
>> >
>> > Eduardo said nice for this part in previous version [1], so we may wait
>> > for his comments?
>> >
>> > [1] http://lists.nongnu.org/archive/html/qemu-devel/2016-06/msg01992.html
> I agree we don't need this check, but I still believe it is a
> nice thing to have.
>
> In addition to detecting user errors, they don't hurt and are
> useful for things like "-cpu host", that don't guarantee
> live-migration compatibility but still allow migration if you
> ensure host capabilities are the same on both sides.
On the other hand we don't check for this on any other property, either
CPU or device, do we? Considering "lmce=on" always breaks on an old
kernel (i.e. there's no need for an explicit ",enforce" on the -cpu
flag), I think it's unnecessary and makes things inconsistent.
> (I was going to suggest enabling lmce automatically on "-cpu
> host" as a follow-up patch, BTW.)
Interesting. Technically it comes from the host kernel, not from the
host CPU. But it does sounds like a good idea; -cpu host pretty much
implies the same kernel (in addition to the same processor) on both
sides of the migration.
Paolo
- Re: [Qemu-devel] [PATCH v4 3/3] i386: publish advised value of MSR_IA32_FEATURE_CONTROL via fw_cfg, (continued)
[Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Haozhong Zhang, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Paolo Bonzini, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Haozhong Zhang, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Paolo Bonzini, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Haozhong Zhang, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Eduardo Habkost, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Eduardo Habkost, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Haozhong Zhang, 2016/06/16
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Eduardo Habkost, 2016/06/17
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Paolo Bonzini, 2016/06/17
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Haozhong Zhang, 2016/06/19
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Paolo Bonzini, 2016/06/20
- Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Haozhong Zhang, 2016/06/20
Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE, Eduardo Habkost, 2016/06/16