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[Xen-devel] question about xl migrate


  • To: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: "Zhang, Chunyu" <zhangcy@xxxxxxxxxxxxxx>
  • Date: Tue, 17 May 2016 09:01:49 +0000
  • Accept-language: zh-CN, en-US
  • Delivery-date: Tue, 17 May 2016 09:02:05 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>
  • Thread-index: AdGwGb8ZARWE3MiRTzWBX7t/m/muJw==
  • Thread-topic: question about xl migrate

hi all

i have two question about xl migrate

write_batch
120     for ( i = 0; i < nr_pfns; ++i )
121     {
122         types[i] = mfns[i] = ctx->save.ops.pfn_to_gfn(ctx,
123                                                       
ctx->save.batch_pfns[i]);
124 
125         /* Likely a ballooned page. */
126         if ( mfns[i] == INVALID_MFN )
127         {
128             set_bit(ctx->save.batch_pfns[i], ctx->save.deferred_pages);
129             ++ctx->save.nr_deferred_pages;
130         }
131     }

1.  line 122
in hvm mode, is not mfns, but gfns.
right?

2. line 125
in hvm mode,would not be a balloon page.
gfn would not be INVALID_MFN.
mfn would be INVALID_MFN.
right?

if what i think is right, maybe we can change those code ?


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