* [RESEND] [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition
@ 2008-12-14 3:44 ` FUJITA Tomonori
0 siblings, 0 replies; 4+ messages in thread
From: FUJITA Tomonori @ 2008-12-14 3:44 UTC (permalink / raw)
To: linuxppc-dev; +Cc: paulus, linux-kernel, jens.axboe
This is a resend of:
http://marc.info/?l=linux-kernel&m=122482703616607&w=2
=
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Subject: [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition
The block layer dropped the virtual merge feature
(b8b3e16cfe6435d961f6aaebcfd52a1ff2a988c5). BIO_VMERGE_BOUNDARY
definition is meaningless now (For POWER, BIO_VMERGE_BOUNDARY has been
meaningless for a long time since POWER disables the virtual merge
feature).
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
arch/powerpc/include/asm/io.h | 7 -------
1 files changed, 0 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 08266d2..494cd8b 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -713,13 +713,6 @@ static inline void * phys_to_virt(unsigned long address)
*/
#define page_to_phys(page) ((phys_addr_t)page_to_pfn(page) << PAGE_SHIFT)
-/* We do NOT want virtual merging, it would put too much pressure on
- * our iommu allocator. Instead, we want drivers to be smart enough
- * to coalesce sglists that happen to have been mapped in a contiguous
- * way by the iommu
- */
-#define BIO_VMERGE_BOUNDARY 0
-
/*
* 32 bits still uses virt_to_bus() for it's implementation of DMA
* mappings se we have to keep it defined here. We also have some old
--
1.5.5.GIT
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [RESEND] [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition
@ 2008-12-14 3:44 ` FUJITA Tomonori
0 siblings, 0 replies; 4+ messages in thread
From: FUJITA Tomonori @ 2008-12-14 3:44 UTC (permalink / raw)
To: linuxppc-dev; +Cc: paulus, benh, jens.axboe, linux-kernel
This is a resend of:
http://marc.info/?l=linux-kernel&m=122482703616607&w=2
=
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Subject: [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition
The block layer dropped the virtual merge feature
(b8b3e16cfe6435d961f6aaebcfd52a1ff2a988c5). BIO_VMERGE_BOUNDARY
definition is meaningless now (For POWER, BIO_VMERGE_BOUNDARY has been
meaningless for a long time since POWER disables the virtual merge
feature).
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
arch/powerpc/include/asm/io.h | 7 -------
1 files changed, 0 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 08266d2..494cd8b 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -713,13 +713,6 @@ static inline void * phys_to_virt(unsigned long address)
*/
#define page_to_phys(page) ((phys_addr_t)page_to_pfn(page) << PAGE_SHIFT)
-/* We do NOT want virtual merging, it would put too much pressure on
- * our iommu allocator. Instead, we want drivers to be smart enough
- * to coalesce sglists that happen to have been mapped in a contiguous
- * way by the iommu
- */
-#define BIO_VMERGE_BOUNDARY 0
-
/*
* 32 bits still uses virt_to_bus() for it's implementation of DMA
* mappings se we have to keep it defined here. We also have some old
--
1.5.5.GIT
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [RESEND] [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition
2008-12-14 3:44 ` FUJITA Tomonori
@ 2008-12-15 7:28 ` Jens Axboe
-1 siblings, 0 replies; 4+ messages in thread
From: Jens Axboe @ 2008-12-15 7:28 UTC (permalink / raw)
To: FUJITA Tomonori; +Cc: linuxppc-dev, paulus, linux-kernel
On Sun, Dec 14 2008, FUJITA Tomonori wrote:
> This is a resend of:
>
> http://marc.info/?l=linux-kernel&m=122482703616607&w=2
>
> =
> From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
> Subject: [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition
>
> The block layer dropped the virtual merge feature
> (b8b3e16cfe6435d961f6aaebcfd52a1ff2a988c5). BIO_VMERGE_BOUNDARY
> definition is meaningless now (For POWER, BIO_VMERGE_BOUNDARY has been
> meaningless for a long time since POWER disables the virtual merge
> feature).
>
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
> ---
> arch/powerpc/include/asm/io.h | 7 -------
> 1 files changed, 0 insertions(+), 7 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
> index 08266d2..494cd8b 100644
> --- a/arch/powerpc/include/asm/io.h
> +++ b/arch/powerpc/include/asm/io.h
> @@ -713,13 +713,6 @@ static inline void * phys_to_virt(unsigned long address)
> */
> #define page_to_phys(page) ((phys_addr_t)page_to_pfn(page) << PAGE_SHIFT)
>
> -/* We do NOT want virtual merging, it would put too much pressure on
> - * our iommu allocator. Instead, we want drivers to be smart enough
> - * to coalesce sglists that happen to have been mapped in a contiguous
> - * way by the iommu
> - */
> -#define BIO_VMERGE_BOUNDARY 0
> -
> /*
> * 32 bits still uses virt_to_bus() for it's implementation of DMA
> * mappings se we have to keep it defined here. We also have some old
> --
> 1.5.5.GIT
>
--
Jens Axboe
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [RESEND] [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition
@ 2008-12-15 7:28 ` Jens Axboe
0 siblings, 0 replies; 4+ messages in thread
From: Jens Axboe @ 2008-12-15 7:28 UTC (permalink / raw)
To: FUJITA Tomonori; +Cc: linuxppc-dev, paulus, benh, linux-kernel
On Sun, Dec 14 2008, FUJITA Tomonori wrote:
> This is a resend of:
>
> http://marc.info/?l=linux-kernel&m=122482703616607&w=2
>
> =
> From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
> Subject: [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition
>
> The block layer dropped the virtual merge feature
> (b8b3e16cfe6435d961f6aaebcfd52a1ff2a988c5). BIO_VMERGE_BOUNDARY
> definition is meaningless now (For POWER, BIO_VMERGE_BOUNDARY has been
> meaningless for a long time since POWER disables the virtual merge
> feature).
>
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
> ---
> arch/powerpc/include/asm/io.h | 7 -------
> 1 files changed, 0 insertions(+), 7 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
> index 08266d2..494cd8b 100644
> --- a/arch/powerpc/include/asm/io.h
> +++ b/arch/powerpc/include/asm/io.h
> @@ -713,13 +713,6 @@ static inline void * phys_to_virt(unsigned long address)
> */
> #define page_to_phys(page) ((phys_addr_t)page_to_pfn(page) << PAGE_SHIFT)
>
> -/* We do NOT want virtual merging, it would put too much pressure on
> - * our iommu allocator. Instead, we want drivers to be smart enough
> - * to coalesce sglists that happen to have been mapped in a contiguous
> - * way by the iommu
> - */
> -#define BIO_VMERGE_BOUNDARY 0
> -
> /*
> * 32 bits still uses virt_to_bus() for it's implementation of DMA
> * mappings se we have to keep it defined here. We also have some old
> --
> 1.5.5.GIT
>
--
Jens Axboe
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2008-12-15 7:55 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2008-12-14 3:44 [RESEND] [PATCH] powerpc: remove dead BIO_VMERGE_BOUNDARY definition FUJITA Tomonori
2008-12-14 3:44 ` FUJITA Tomonori
2008-12-15 7:28 ` Jens Axboe
2008-12-15 7:28 ` Jens Axboe
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