[Xen-changelog] [xen-unstable] Introduce 'bootscrub' boolean cmdline option. Default on.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1183987846 -3600
# Node ID 83fd4ad219cd321024c6b5f01b85464cd64faf2d
# Parent  5e8eb0cf2dafc5d0e990cbd5ba18342193f2f604
Introduce 'bootscrub' boolean cmdline option. Default on.

no-bootscrub will disable boot-time RAM scrubbing, speeding up boot
time significantly on big-memory systems.

Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 xen/common/page_alloc.c |    9 +++++++++
 1 files changed, 9 insertions(+)

diff -r 5e8eb0cf2daf -r 83fd4ad219cd xen/common/page_alloc.c
--- a/xen/common/page_alloc.c   Mon Jul 09 14:29:53 2007 +0100
+++ b/xen/common/page_alloc.c   Mon Jul 09 14:30:46 2007 +0100
@@ -46,6 +46,12 @@ string_param("badpage", opt_badpage);
 string_param("badpage", opt_badpage);
 
 /*
+ * no-bootscrub -> Free pages are not zeroed during boot.
+ */
+static int opt_bootscrub __initdata = 1;
+boolean_param("bootscrub", opt_bootscrub);
+
+/*
  * Bit width of the DMA heap.
  */
 static unsigned int  dma_bitsize = CONFIG_DMA_BITSIZE;
@@ -623,6 +629,9 @@ void __init scrub_heap_pages(void)
 {
     void *p;
     unsigned long mfn;
+
+    if ( !opt_bootscrub )
+        return;
 
     printk("Scrubbing Free RAM: ");
 

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