[PATCH] x86: reduce back the alignment of the per-CPU data section

[PATCH] x86: reduce back the alignment of the per-CPU data section

[Jan Beulich]

This complements commit 47f19a0814e80e1d4e5c17d61b70fca85ea09162,
reverting one leftover of fe8e0c25cad28e8858ecfa5863333c70685a6811.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Alexander van Heukelum <heukelum@fastmail.fm>

---
 arch/x86/kernel/vmlinux.lds.S |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 2.6.38-rc4/arch/x86/kernel/vmlinux.lds.S
+++ 2.6.38-rc4-x86-percpu-align/arch/x86/kernel/vmlinux.lds.S
@@ -305,7 +305,7 @@ SECTIONS
 	}
 
 #if !defined(CONFIG_X86_64) || !defined(CONFIG_SMP)
-	PERCPU(THREAD_SIZE)
+	PERCPU(PAGE_SIZE)
 #endif
 
 	. = ALIGN(PAGE_SIZE);

Re: [PATCH] x86: reduce back the alignment of the per-CPU data section

[Alexander van Heukelum]

Hi Jan,

This is indeed a leftover. Thanks.

This was once done to fix i386-UP, because the irq stacks were part of the percpu area. The stacks are now allocated dynamically.

Acked-by: Alexander van Heukelum <heukelum@fastmail.fm>

Greetings,
    Alexander

On Wed, 09 Feb 2011 08:22 +0000, "Jan Beulich" <JBeulich@novell.com> wrote:
> This complements commit 47f19a0814e80e1d4e5c17d61b70fca85ea09162,
> reverting one leftover of fe8e0c25cad28e8858ecfa5863333c70685a6811.
> 
> Signed-off-by: Jan Beulich <jbeulich@novell.com>
> Cc: Alexander van Heukelum <heukelum@fastmail.fm>
> 
> ---
>  arch/x86/kernel/vmlinux.lds.S |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- 2.6.38-rc4/arch/x86/kernel/vmlinux.lds.S
> +++ 2.6.38-rc4-x86-percpu-align/arch/x86/kernel/vmlinux.lds.S
> @@ -305,7 +305,7 @@ SECTIONS
>  	}
>  
>  #if !defined(CONFIG_X86_64) || !defined(CONFIG_SMP)
> -       PERCPU(THREAD_SIZE)
> +       PERCPU(PAGE_SIZE)
>  #endif
>  
>  	. = ALIGN(PAGE_SIZE);
> 
> 
> 

[tip:x86/asm] x86: Reduce back the alignment of the per-CPU data section

[tip-bot for Jan Beulich]

Commit-ID:  94d1ac8b55799be10487fff9766cce6d6628462a
Gitweb:     http://git.kernel.org/tip/94d1ac8b55799be10487fff9766cce6d6628462a
Author:     Jan Beulich <JBeulich@novell.com>
AuthorDate: Wed, 9 Feb 2011 08:22:46 +0000
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 10 Feb 2011 13:31:36 +0100

x86: Reduce back the alignment of the per-CPU data section

This complements commit:

  47f19a0814e8: percpu: Remove the multi-page alignment facility

reverting one leftover of:

  fe8e0c25cad2: x86, 32-bit: Align percpu area and irq stacks to THREAD_SIZE

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Alexander van Heukelum <heukelum@fastmail.fm>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4D525CE60200007800030EE5@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Alexander van Heukelum <heukelum@fastmail.fm>
---
 arch/x86/kernel/vmlinux.lds.S |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index bf47007..e9f7a3c 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -305,7 +305,7 @@ SECTIONS
 	}
 
 #if !defined(CONFIG_X86_64) || !defined(CONFIG_SMP)
-	PERCPU(THREAD_SIZE)
+	PERCPU(PAGE_SIZE)
 #endif
 
 	. = ALIGN(PAGE_SIZE);