Re: [Qemu-devel] 回??: [PATCH 2/2] umem: chardevice for kvm postcopy

[Isaku Yamahata <yamahata@valinux.co.jp>]

Hmm, this sounds like you haven't specified -postcopy option at the
incoming qemu.
How did you start incoming qemu?


On Thu, Jan 05, 2012 at 07:10:42PM +0800, Tommy wrote:
> After I use this series of patches, but the migration failed.
> 2, I start migrate -d -p -n tcp:xxx:4444 on the outgoing node
> 2, on the incoming part, the qemu get stuck and migration failed
> the  destnation can not typing any more
>  
> today I found it's just at qemu_loadvm_state, just after the while loop ,maybe
> in cpu_synchronize_all_post_init
> I think there is some problems with qemu side for it doesn't get to the umem
> part
> I'm not sure about the problem
> do you have some suggestion?
> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
> Tommy
>  
> From: Isaku Yamahata
> Date: 2012-01-05 18:48
> To: thfbjyddx
> CC: t.hirofuchi; qemu-devel; kvm; satoshi.itoh
> Subject: Re: [Qemu-devel]  ??: [PATCH 2/2] umem: chardevice for kvm postcopy
> On Thu, Jan 05, 2012 at 12:08:50PM +0800, thfbjyddx wrote:
> > hi,
> > I've tried to use this patch,
>  
> Oh great! Can we share your results?
>  
>  
> > but it doesn't work for compiling error on
> >  
> >  page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, vmf->address);//vmf->
> > virtual_address?
> >  
> > I guess it's for the wrong kernel version?
> > can you give me some detail about this or any clue?
> > 3x 
>  
> Thank you for report. The following should fix.
> It depends on kernel configuration. My config didn't catch it.
>  
> diff --git a/drivers/char/umem.c b/drivers/char/umem.c
> index 4d031b5..853f1ce 100644
> --- a/drivers/char/umem.c
> +++ b/drivers/char/umem.c
> @@ -129,7 +129,7 @@ static int umem_minor_fault(struct umem *umem,
>    * vmf->page = fake_vmf->page;
>    */
>  
> - page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, vmf->address);
> + page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, vmf->virtual_address);
>   if (!page)
>   return VM_FAULT_OOM;
>   if (mem_cgroup_cache_charge(page, vma->vm_mm, GFP_KERNEL)) {
>  
>  
>  
> -- 
> yamahata
>  
>  

-- 
yamahata