linux-kernel - Re: [PATCH 01/14] x86, boot: align the .bss section in the decompressor

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Message-ID: <20090508171556.GN6132@lenovo>
Date:	Fri, 8 May 2009 21:15:56 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	linux-kernel@...r.kernel.org, vgoyal@...hat.com, hbabu@...ibm.com,
	kexec@...ts.infradead.org, ying.huang@...el.com, mingo@...e.hu,
	tglx@...utronix.de, ebiederm@...ssion.com, sam@...nborg.org
Subject: Re: [PATCH 01/14] x86, boot: align the .bss section in the
	decompressor

[H. Peter Anvin - Fri, May 08, 2009 at 10:03:34AM -0700]
| Cyrill Gorcunov wrote:
| > | 
| > | diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S
| > | index 0d26c92..27c168d 100644
| > | --- a/arch/x86/boot/compressed/vmlinux.lds.S
| > | +++ b/arch/x86/boot/compressed/vmlinux.lds.S
| > | @@ -42,6 +42,7 @@ SECTIONS
| > |  		*(.data.*)
| > |  		_edata = . ;
| > |  	}
| > | +	. = ALIGN(32);
| > |  	.bss : {
| > |  		_bss = . ;
| > |  		*(.bss)
| > | -- 
| > | 1.6.0.6
| > | 
| > 
| > Hi Peter, should not it be ALIGN(8) rather? I thought
| > we keep these sections as tight as possible in a sake
| > of limitation of setup code size. Perhaps I miss something.
| > 
| 
| This isn't the setup code at all.  This is the actual kernel, although
| in its compressed form.  Furthermore, this is the bss, so it doesn't
| affect the compressed image size.
| 
| 	-hpa
| 

yeah, unfortunately I reveal that when my mail already gone.
though I don't understand why 32 is there... could you please?

	-- Cyrill
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