Re: [Xen-devel] Re: [PATCH 0/4] stubdom-dm: Support live migration of HVM domain with stubdom-dm

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Samuel Thibault writes ("[Xen-devel] Re: [PATCH 0/4] stubdom-dm: Support live 
migration of HVM domain with stubdom-dm"):
> Yosuke Iwamatsu, le Tue 16 Dec 2008 18:22:20 +0900, a écrit :
> > This series of patches is an attempt to support live migration of hvm
> > domains with stubdom-dm.
> 
> Err, I'm a bit surprised. I haven't tested it since then, but I'm sure
> live migration was working with stubdoms a few months ago, without
> the need for a logdirty shared buffer.  This works thanks to the few
> lines at the end of the cpu_physical_memory_rw() function that tell the
> hypervisor about modified memory.  Actually, the plan was even to use
> that bit of code in all cases (not only non-stubdom), so as to get rid
> of the logdirty shared buffer completely.

I take it you're referring to this:

#ifdef CONFIG_STUBDOM
    if (logdirty_bitmap != NULL)
        xc_hvm_modified_memory(xc_handle, domid, _addr >> TARGET_PAGE_BITS,
                ((_addr + _len + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS)
                    - (_addr >> TARGET_PAGE_BITS));
#endif

Yosuke Iwamatsu: is this not working for you then ?  It's possible
that I've broken it somehow.

Ian.

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