linux-kernel - Re: x86_64: remove debug code from arch_add

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Date:	Wed, 29 Oct 2008 09:30:53 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Gary Hade <garyhade@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Yinghai Lu <yinghai@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: x86_64: remove debug code from arch_add_memory()


* Gary Hade <garyhade@...ibm.com> wrote:

> 
> Gets rid of dmesg spam created during physical memory hot-add which
> will very likely confuse users.  The change removes what appears to
> be debugging code which I assume was unintentionally included in:
>   x86: arch/x86/mm/init_64.c printk fixes
>   commit 10f22dde556d1ed41d55355d1fb8ad495f9810c8
> 
> Signed-off-by: Gary Hade <garyhade@...ibm.com>
> 
> ---
>  arch/x86/mm/init_64.c |    1 -
>  1 file changed, 1 deletion(-)

applied to tip/x86/urgent, thanks Gary!

Note, i changed it slightly: instead of removing it completely i 
changed it to WARN_ON_ONCE(ret), to show us when __add_pages() fails. 
(which is what the original intention was there) This does not trigger 
in your tests, right?

	Ingo

--------------->
>From fe8b868eccb9f85a0e231e35f0abac5b39bac801 Mon Sep 17 00:00:00 2001
From: Gary Hade <garyhade@...ibm.com>
Date: Tue, 28 Oct 2008 16:43:14 -0700
Subject: [PATCH] x86: remove debug code from arch_add_memory()

Impact: remove incorrect WARN_ON(1)

Gets rid of dmesg spam created during physical memory hot-add which
will very likely confuse users.  The change removes what appears to
be debugging code which I assume was unintentionally included in:

  x86: arch/x86/mm/init_64.c printk fixes
  commit 10f22dde556d1ed41d55355d1fb8ad495f9810c8

Signed-off-by: Gary Hade <garyhade@...ibm.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/mm/init_64.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index ebe1811..9db01db 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -858,7 +858,7 @@ int arch_add_memory(int nid, u64 start, u64 size)
 		max_pfn_mapped = last_mapped_pfn;
 
 	ret = __add_pages(zone, start_pfn, nr_pages);
-	WARN_ON(1);
+	WARN_ON_ONCE(ret);
 
 	return ret;
 }
--
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