Index: apps/buffering.c
===================================================================
--- apps/buffering.c	(revision 24440)
+++ apps/buffering.c	(working copy)
@@ -618,7 +618,10 @@
             lseek(h->fd, h->offset, SEEK_SET);
     }
 
+/* AB: experimental removal of boost when using DMA */
+#ifndef HAVE_ATA_DMA    
     trigger_cpu_boost();
+#endif
 
     if (h->type == TYPE_ID3)
     {
@@ -1415,9 +1418,12 @@
 
     while (true)
     {
+/* AB: experimental removal of boost when using DMA */
+#ifndef HAVE_ATA_DMA
         if (!filling) {
             cancel_cpu_boost();
         }
+#endif
 
         queue_wait_w_tmo(&buffering_queue, &ev, filling ? 5 : HZ/2);