[Xen-devel] [PATCH v2 3/3] libxc: bail immediately when PV superpage is discovered

[Wei Liu <wei.liu2@xxxxxxxxxx>]

The original code was added with the hope that PV superpage migration
might work. But it was never proven that the code actually worked.

Now that PV superpage is gone, simplify the code by returning error
immediately.

Suggested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/libxc/xc_sr_save_x86_pv.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/tools/libxc/xc_sr_save_x86_pv.c b/tools/libxc/xc_sr_save_x86_pv.c
index 36b10583d6..ff5efe954b 100644
--- a/tools/libxc/xc_sr_save_x86_pv.c
+++ b/tools/libxc/xc_sr_save_x86_pv.c
@@ -975,14 +975,9 @@ static int normalise_pagetable(struct xc_sr_context *ctx, 
const uint64_t *src,
 
             if ( (type > XEN_DOMCTL_PFINFO_L1TAB) && (pte & _PAGE_PSE) )
             {
-                if ( !ctx->dominfo.paused )
-                    errno = EAGAIN;
-                else
-                {
-                    ERROR("Cannot migrate superpage (L%lu[%u]: 
0x%016"PRIx64")",
-                          type >> XEN_DOMCTL_PFINFO_LTAB_SHIFT, i, pte);
-                    errno = E2BIG;
-                }
+                ERROR("Cannot migrate superpage (L%lu[%u]: 0x%016"PRIx64")",
+                      type >> XEN_DOMCTL_PFINFO_LTAB_SHIFT, i, pte);
+                errno = E2BIG;
                 return -1;
             }
 
-- 
2.11.0


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