Re: [Xen-devel] [PATCH v9 3/3] tools/libxc: use superpages during restore of HVM guest

[Olaf Hering <olaf@xxxxxxxxx>]

On Fri, Sep 08, Olaf Hering wrote:

> A related question: is it save to increase MAX_BATCH_SIZE from 1024 to
> (256*1024) to transfer a whole gigabyte at a time? That way it will be
> easier to handle holes within a 1GB superpage.

To answer my own question:

This change leads to this error:

-#define MAX_BATCH_SIZE 1024   /* up to 1024 pages (4MB) at a time */
+#define MAX_BATCH_SIZE SUPERPAGE_1GB_NR_PFNS   /* up to 1GB at a time */

...
xc: info: Found x86 HVM domain from Xen 4.10
xc: detail: dom 9 p2m_size fee01 max_pages 100100
xc: info: Restoring domain
xc: error: Failed to read Record Header from stream (0 = Success): Internal 
error
xc: error: Restore failed (0 = Success): Internal error
...

Olaf

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