vss: Remove self-made prefaulting.

[paraslash.git] / vss.c

diff --git a/vss.c b/vss.c
index 77d2f37626eaee75deeb7ab2e52b99d9dfd50182..f225aa74568fb057058cea5d3590aae0ffeffaf1 100644 (file)
--- a/vss.c
+++ b/vss.c
@@ -1078,25 +1078,6 @@ static void vss_send(struct vss_task *vsst)
                        senders[i].send(mmd->current_chunk, mmd->chunks_sent,
                                buf, len, vsst->header_buf, vsst->header_len);
                }
-               /*
-                * Prefault next chunk(s)
-                *
-                * If the backing device of the memory-mapped audio file is
-                * slow and read-ahead is turned off or prevented for some
-                * reason, e.g. due to memory pressure, it may take much longer
-                * than the chunk interval to get the next chunk on the wire,
-                * causing buffer underruns on the client side. Mapping the
-                * file with MAP_POPULATE seems to help a bit, but it does not
-                * eliminate the delays completely. Moreover, it is supported
-                * only on Linux. So we do our own read-ahead here.
-                */
-               if (mmd->current_chunk > 0) { /* chunk 0 might be on the heap */
-                       buf += len;
-                       for (i = 0; i < 5 && buf < vsst->map + vsst->mapsize; i++) {
-                               __a_unused volatile char x = *buf;
-                               buf += 4096;
-                       }
-               }
                mmd->chunks_sent++;
                mmd->current_chunk++;
        }