Optionally do not allow a swap partition smaller than physical RAM.

src/modules/partition/gui/EraseDiskPage.cpp

@@ -292,6 +292,23 @@ EraseDiskPage::swapSuggestion( const qint64 availableSpaceB ) const {
         overestimationFactor = 1.10;
     }
 
+    bool ensureSuspendToDisk =
+        Calamares::JobQueue::instance()->globalStorage()->
+            value( "ensureSuspendToDisk" ).toBool();
+
+    if ( ensureSuspendToDisk )
+    {
+        if ( availableRamB < 4 GiB )
+            suggestedSwapSizeB = qMax( 2 GiB, availableRamB * 2 );
+        else if ( availableRamB >= 4 GiB && availableRamB < 8 GiB )
+            suggestedSwapSizeB = 8 GiB;
+        else
+            suggestedSwapSizeB = availableRamB;
+
+        suggestedSwapSizeB *= overestimationFactor;
+    }
+    else //if we don't care about suspend to disk
+    {
         if ( availableRamB < 2 GiB )
             suggestedSwapSizeB = qMax( 2 GiB, availableRamB * 2 );
         else if ( availableRamB >= 2 GiB && availableRamB < 8 GiB )
@@ -303,11 +320,12 @@ EraseDiskPage::swapSuggestion( const qint64 availableSpaceB ) const {
 
         suggestedSwapSizeB *= overestimationFactor;
 
-    // don't use more 10% of available space
+        // don't use more than 10% of available space
         qreal maxSwapDiskRatio = 1.10;
         qint64 maxSwapSizeB = availableSpaceB * maxSwapDiskRatio;
         if ( suggestedSwapSizeB > maxSwapSizeB )
             suggestedSwapSizeB = maxSwapSizeB;
+    }
 
     cDebug() << "Suggested swap size:" << suggestedSwapSizeB / 1024. / 1024. /1024. << "GiB";