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From: "H. Peter Anvin" <hpa@zytor.com>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: "H. Peter Anvin" <hpa@linux.intel.com>,
	linux-kernel@vger.kernel.org, vgoyal@redhat.com,
	hbabu@us.ibm.com, kexec@lists.infradead.org,
	ying.huang@intel.com, mingo@elte.hu, tglx@linutronix.de,
	ebiederm@xmission.com, sam@ravnborg.org
Subject: Re: [PATCH 01/14] x86, boot: align the .bss section in the	decompressor
Date: Fri, 08 May 2009 10:03:34 -0700	[thread overview]
Message-ID: <4A0465E6.9000401@zytor.com> (raw)
In-Reply-To: <20090508075354.GA6132@lenovo>

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

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.


WARNING: multiple messages have this Message-ID (diff)
From: "H. Peter Anvin" <hpa@zytor.com>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
	hbabu@us.ibm.com, ebiederm@xmission.com, ying.huang@intel.com,
	mingo@elte.hu, "H. Peter Anvin" <hpa@linux.intel.com>,
	sam@ravnborg.org, tglx@linutronix.de, vgoyal@redhat.com
Subject: Re: [PATCH 01/14] x86, boot: align the .bss section in the	decompressor
Date: Fri, 08 May 2009 10:03:34 -0700	[thread overview]
Message-ID: <4A0465E6.9000401@zytor.com> (raw)
In-Reply-To: <20090508075354.GA6132@lenovo>

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

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.


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  reply	other threads:[~2009-05-08 17:07 UTC|newest]

Thread overview: 90+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-07 22:26 [PATCH 00/14] RFC: x86: relocatable kernel changes H. Peter Anvin
2009-05-07 22:26 ` H. Peter Anvin
2009-05-07 22:26 ` [PATCH 01/14] x86, boot: align the .bss section in the decompressor H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-08  7:17   ` Sam Ravnborg
2009-05-08  7:17     ` Sam Ravnborg
2009-05-08  8:18     ` Eric Dumazet
2009-05-08  8:18       ` Eric Dumazet
2009-05-08 16:54     ` H. Peter Anvin
2009-05-08 16:54       ` H. Peter Anvin
2009-05-08  7:53   ` Cyrill Gorcunov
2009-05-08  7:53     ` Cyrill Gorcunov
2009-05-08 17:03     ` H. Peter Anvin [this message]
2009-05-08 17:03       ` H. Peter Anvin
2009-05-08 17:15       ` Cyrill Gorcunov
2009-05-08 17:15         ` Cyrill Gorcunov
2009-05-08 17:21         ` H. Peter Anvin
2009-05-08 17:21           ` H. Peter Anvin
2009-05-07 22:26 ` [PATCH 02/14] x86, boot: honor CONFIG_PHYSICAL_START when relocatable H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-08  7:34   ` Sam Ravnborg
2009-05-08  7:34     ` Sam Ravnborg
2009-05-08 16:58     ` H. Peter Anvin
2009-05-08 16:58       ` H. Peter Anvin
2009-05-07 22:26 ` [PATCH 03/14] x86, config: change defaults PHYSICAL_START and PHYSICAL_ALIGN H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-08  7:36   ` Sam Ravnborg
2009-05-08  7:36     ` Sam Ravnborg
2009-05-08  9:47     ` Ingo Molnar
2009-05-08  9:47       ` Ingo Molnar
2009-05-08 17:01     ` H. Peter Anvin
2009-05-08 17:01       ` H. Peter Anvin
2009-05-07 22:26 ` [PATCH 04/14] x86, boot: unify use LOAD_PHYSICAL_ADDR and LOAD_PHYSICAL_ALIGN H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-07 22:26 ` [PATCH 05/14] kbuild: allow compressors (gzip, bzip2, lzma) to take multiple inputs H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-08  7:42   ` Sam Ravnborg
2009-05-08  7:42     ` Sam Ravnborg
2009-05-08 20:18     ` H. Peter Anvin
2009-05-08 20:18       ` H. Peter Anvin
2009-05-08 20:47       ` Sam Ravnborg
2009-05-08 20:47         ` Sam Ravnborg
2009-05-08 20:49         ` H. Peter Anvin
2009-05-08 20:49           ` H. Peter Anvin
2009-05-08 21:33           ` Sam Ravnborg
2009-05-08 21:33             ` Sam Ravnborg
2009-05-07 22:26 ` [PATCH 06/14] x86: add a Kconfig symbol for when relocations are needed H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-07 22:26 ` [PATCH 07/14] x86, boot: simplify arch/x86/boot/compressed/Makefile H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-08  7:45   ` Sam Ravnborg
2009-05-08  7:45     ` Sam Ravnborg
2009-05-07 22:26 ` [PATCH 08/14] x86, boot: use BP_scratch in arch/x86/boot/compressed/head_*.S H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-07 22:26 ` [PATCH 09/14] x86, boot: add new runtime_address and runtime_size bzImage fields H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-08  7:55   ` Sam Ravnborg
2009-05-08  7:55     ` Sam Ravnborg
2009-05-08 21:09     ` H. Peter Anvin
2009-05-08 21:09       ` H. Peter Anvin
2009-05-08 21:35       ` Sam Ravnborg
2009-05-08 21:35         ` Sam Ravnborg
2009-05-07 22:26 ` [PATCH 10/14] x86, doc: document the runtime_start " H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-07 22:26 ` [PATCH 11/14] x86, boot: use rep movsq to move kernel on 64 bits H. Peter Anvin
2009-05-07 22:26   ` H. Peter Anvin
2009-05-07 22:27 ` [PATCH 12/14] x86, boot: zero EFLAGS on 32 bits H. Peter Anvin
2009-05-07 22:27   ` H. Peter Anvin
2009-05-07 22:27 ` [PATCH 13/14] x86: make CONFIG_RELOCATABLE the default H. Peter Anvin
2009-05-07 22:27   ` H. Peter Anvin
2009-05-07 22:27 ` [PATCH 14/14] x86, defconfig: update defconfigs to relocatable H. Peter Anvin
2009-05-07 22:27   ` H. Peter Anvin
2009-05-08  1:23 ` [PATCH 00/14] RFC: x86: relocatable kernel changes Eric W. Biederman
2009-05-08  1:23   ` Eric W. Biederman
2009-05-08  5:31   ` H. Peter Anvin
2009-05-08  5:31     ` H. Peter Anvin
2009-05-08  6:54     ` Eric W. Biederman
2009-05-08  6:54       ` Eric W. Biederman
2009-05-08 18:04       ` H. Peter Anvin
2009-05-08 18:04         ` H. Peter Anvin
2009-05-08 18:47       ` H. Peter Anvin
2009-05-08 18:47         ` H. Peter Anvin
2009-05-11  5:18         ` RFC: x86: relocatable kernel changes (revised spec) H. Peter Anvin
2009-05-11  5:18           ` H. Peter Anvin
2009-05-11 11:54           ` Eric W. Biederman
2009-05-11 11:54             ` Eric W. Biederman
2009-05-11 16:03             ` H. Peter Anvin
2009-05-11 16:03               ` H. Peter Anvin
2009-05-11 17:56             ` RFC: x86: relocatable kernel changes (revised spec v2) H. Peter Anvin
2009-05-11 17:56               ` H. Peter Anvin

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