Ticket #2551: prefetch-no-sequential.patch

libtransmission/fdlimit.c

@@ -366 +366 @@
 
     /* open the file */
     flags = doWrite ? ( O_RDWR | O_CREAT ) : O_RDONLY;
-#ifdef O_SEQUENTIAL
-    flags |= O_SEQUENTIAL;
-#endif
 #ifdef O_LARGEFILE
     flags |= O_LARGEFILE;
 #endif
@@ -395 +392 @@
     if( doWrite && !alreadyExisted && ( preallocationMode == TR_PREALLOCATE_SPARSE ) )
         preallocateFileSparse( file->fd, desiredFileSize );
 
-#ifdef HAVE_POSIX_FADVISE
-    /* this doubles the OS level readahead buffer, which in practice
-     * turns out to be a good thing, because many (most?) clients request
-     * chunks of blocks in order.
-     * It's okay for this to fail silently, so don't let it affect errno */
-    {
-        const int err = errno;
-        posix_fadvise( file->fd, 0, 0, POSIX_FADV_SEQUENTIAL );
-        errno = err;
-    }
-#endif
-
     return 0;
 }