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Re: [Qemu-devel] [PATCH RESEND v4 17/18] target-i386: block migration an
From: |
Juan Quintela |
Subject: |
Re: [Qemu-devel] [PATCH RESEND v4 17/18] target-i386: block migration and savevm if invariant tsc is exposed |
Date: |
Thu, 15 May 2014 14:17:11 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
Eduardo Habkost <address@hidden> wrote:
> From: Marcelo Tosatti <address@hidden>
>
> Invariant TSC documentation mentions that "invariant TSC will run at a
> constant rate in all ACPI P-, C-. and T-states".
>
> This is not the case if migration to a host with different TSC frequency
> is allowed, or if savevm is performed. So block migration/savevm.
>
> Cc: Juan Quintela <address@hidden>
> Signed-off-by: Marcelo Tosatti <address@hidden>
> Reviewed-by: Eduardo Habkost <address@hidden>
> Signed-off-by: Eduardo Habkost <address@hidden>
Reviewed-by: Juan Quintela <address@hidden>
I don't have a better suggestion. Really we could allow migration to
identical machines, but I assume that there is not a way to read the tsc
frequency?
(Althought reading the model name/numbers could be enough?)
I.e. Add a subsection that includes the cpu model name, or whatever we
can have to identify the host cpu?
Later, Juan.
- [Qemu-devel] [PATCH RESEND v4 12/18] target-i386: Support check/enforce flags in TCG mode, too, (continued)
- [Qemu-devel] [PATCH RESEND v4 12/18] target-i386: Support check/enforce flags in TCG mode, too, Eduardo Habkost, 2014/05/14
- [Qemu-devel] [PATCH RESEND v4 13/18] target-i386: Support "-cpu host" in TCG mode, Eduardo Habkost, 2014/05/14
- [Qemu-devel] [PATCH RESEND v4 15/18] target-i386: Set migratable=yes by default, Eduardo Habkost, 2014/05/14
- [Qemu-devel] [PATCH RESEND v4 14/18] target-i386: Add "migratable" property to "host" CPU model, Eduardo Habkost, 2014/05/14
- [Qemu-devel] [PATCH RESEND v4 16/18] savevm: check vmsd for migratability status, Eduardo Habkost, 2014/05/14
[Qemu-devel] [PATCH RESEND v4 17/18] target-i386: block migration and savevm if invariant tsc is exposed, Eduardo Habkost, 2014/05/14
- Re: [Qemu-devel] [PATCH RESEND v4 17/18] target-i386: block migration and savevm if invariant tsc is exposed,
Juan Quintela <=
[Qemu-devel] [PATCH RESEND v4 18/18] target-i386: support "invariant tsc" flag, Eduardo Habkost, 2014/05/14
Re: [Qemu-devel] [PATCH RESEND v4 00/18] target-i386: CPU feature flag queue, Andreas Färber, 2014/05/14