linux-kernel - Re: [PATCH] x86: _edata should include all .data.* sections on X86

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Message-ID: <4A5C5A59.5080304@fisher-privat.net>
Date:	Tue, 14 Jul 2009 12:13:45 +0200
From:	Alexey Fisher <bug-track@...her-privat.net>
To:	Catalin Marinas <catalin.marinas@....com>
CC:	Pekka Enberg <penberg@...helsinki.fi>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Sam Ravnborg <sam@...nborg.org>, Ingo Molnar <mingo@...e.hu>,
	x86@...nel.org
Subject: Re: [PATCH] x86: _edata should include all .data.* sections on X86_64

With this patch i have only 25 reports....
but i still have a lot of ext4 and some other reports.


Catalin Marinas schrieb:
> The .data.read_mostly and .data.cacheline_aligned sections aren't
> covered by the _sdata .. _edata range on X86_64. This affects the
> kmemleak reporting leading to possible false positives by not scanning
> all the whole data section.
> 
> Signed-off-by: Catalin Marinas <catalin.marinas@....com>
> Cc: Sam Ravnborg <sam@...nborg.org>
> Cc: Ingo Molnar <mingo@...e.hu>
> ---
> 
> (I re-posted this patch with comments and cc'ing the relevant people)
> 
>  arch/x86/kernel/vmlinux.lds.S |    7 -------
>  1 files changed, 0 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
> index 367e878..59f31d2 100644
> --- a/arch/x86/kernel/vmlinux.lds.S
> +++ b/arch/x86/kernel/vmlinux.lds.S
> @@ -112,11 +112,6 @@ SECTIONS
>  		_sdata = .;
>  		DATA_DATA
>  		CONSTRUCTORS
> -
> -#ifdef CONFIG_X86_64
> -		/* End of data section */
> -		_edata = .;
> -#endif
>  	} :data
>  
>  #ifdef CONFIG_X86_32
> @@ -156,10 +151,8 @@ SECTIONS
>  	.data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
>  		*(.data.read_mostly)
>  
> -#ifdef CONFIG_X86_32
>  		/* End of data section */
>  		_edata = .;
> -#endif
>  	}
>  
>  #ifdef CONFIG_X86_64
> 

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