kerndat: check_pagemap: reword retried case explanation

Signed-off-by: Michał Mirosław <emmir@google.com>
checkpoint-restore · Aug 28, 2023 · e5f8eae · e5f8eae
1 parent 200cdcd
commit e5f8eae
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/criu/kerndat.c b/criu/kerndat.c
@@ -84,8 +84,8 @@ static int check_pagemap(void)
 			return -1;
 		}
 		/* The page can be swapped out by the time the read occurs,
-		 * in which case the rest of the bits are a swap offset,
-		 * and can't be used to determine whether PFNs are visible.
+		 * in which case the rest of the bits are a swap type + offset
+		 * (which could be zero even if not hidden).
 		 * Retry if this happens. */
 		if (pfn & PME_PRESENT)
 			break;