sys-apps/preload/files/0002-Create-short-overlapping-io-bursts.patch


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From 97814f566aeb84f60031008c3dda5457ba176fe7 Mon Sep 17 00:00:00 2001
From: Kai Krakow <kai@kaishome.de>
Date: Mon, 28 Jul 2008 20:57:06 +0200
Subject: [PATCH] Create short overlapping io bursts

Modify the wait_for_children() mechanism to create short
burst instead of constant flow of new io requests. This
is more fair and should enable the kernel to rearrange
io requests better.
---
 src/readahead.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/readahead.c b/src/readahead.c
index 7617449..466961d 100644
--- a/src/readahead.c
+++ b/src/readahead.c
@@ -121,7 +121,7 @@ process_file(const char *path, size_t offset, size_t length)
   int maxprocs = conf->system.maxprocs;
 
   if (procs >= maxprocs)
-    wait_for_children (maxprocs);
+    wait_for_children (maxprocs >> 1);
 
   if (maxprocs > 0)
     {
-- 
1.5.4.5