RE: [Xen-devel] [PATCH] TSC scaling for live migration between platforms with different TSC frequecies

["Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>]

Hi, Keir
        This is the new version which has addressed the comments from the 
mailing list. Please review it again.  Thanks!
Xiantao

Zhang, Xiantao wrote:
> Hi, Keir
> 
>     This patchset targets for enabling TSC scaling in software for
>     live migration between platforms with different TSC frequecies. 
> Once found the target host's frequency is different with source
> host's, hypervisor will trap and emulate guest's all rdtsc
> instructions with its expected frequency. If hardware's TSC frequency
> is difffernt with guest's exepcted freq, guest may behave abnormally,
> eg. incorrect wallclock, soft lockup, even hang in some cases. 
> Therefore, this patchset is necessary to avoid such issues.      
> 
> PATCH 0001-- Save guest's preferred TSC in image for save/restore and
> migration 
> PATCH 0002-- Move multidiv64 as a library function.
> PATCH 0003-- Scaling host TSC freqeuncy patch.
> 
> Signed-off-by Xiantao Zhang <xiantao.zhang@xxxxxxxxx>
> Xiantao

Attachment: 0003-scaling_guest_tsc.patch
Description: 0003-scaling_guest_tsc.patch

Attachment: 0001-save_tsc_frequency.patch
Description: 0001-save_tsc_frequency.patch

Attachment: 0002-move_multidiv64_out.patch
Description: 0002-move_multidiv64_out.patch

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