2011-02-09 08:22:12

by Jan Beulich

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

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

Signed-off-by: Jan Beulich <[email protected]>
Cc: Alexander van Heukelum <[email protected]>

---
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);

2011-02-09 08:47:35

by Alexander van Heukelum

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

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 <[email protected]>

Greetings,
Alexander

On Wed, 09 Feb 2011 08:22 +0000, "Jan Beulich" <[email protected]> wrote:
> This complements commit 47f19a0814e80e1d4e5c17d61b70fca85ea09162,
> reverting one leftover of fe8e0c25cad28e8858ecfa5863333c70685a6811.
>
> Signed-off-by: Jan Beulich <[email protected]>
> Cc: Alexander van Heukelum <[email protected]>
>
> ---
> 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);
>
>
>

2011-02-10 14:44:39

by Jan Beulich

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

Commit-ID: 94d1ac8b55799be10487fff9766cce6d6628462a
Gitweb: http://git.kernel.org/tip/94d1ac8b55799be10487fff9766cce6d6628462a
Author: Jan Beulich <[email protected]>
AuthorDate: Wed, 9 Feb 2011 08:22:46 +0000
Committer: Ingo Molnar <[email protected]>
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 <[email protected]>
Acked-by: Alexander van Heukelum <[email protected]>
Cc: Linus Torvalds <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Cc: Alexander van Heukelum <[email protected]>
---
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);