2006-10-02 15:37:27

by David Howells

Subject: [PATCH] FRV: Permit large kmalloc allocations

From: David Howells <[email protected]>

Permit kmalloc() to make allocations of up to 32MB if so configured. This may
be useful under NOMMU conditions where vmalloc() can't do this.

Signed-Off-By: David Howells <[email protected]>
---

arch/frv/Kconfig | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index f7b171b..69f9846 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -86,6 +86,14 @@ config HIGHPTE
with a lot of RAM, this can be wasteful of precious low memory.
Setting this option will put user-space page tables in high memory.

+config LARGE_ALLOCS
+ bool "Allow allocating large blocks (> 1MB) of memory"
+ help
+ Allow the slab memory allocator to keep chains for very large memory
+ sizes - upto 32MB. You may need this if your system has a lot of RAM,
+ and you need to able to allocate very large contiguous chunks. If
+ unsure, say N.
+
source "mm/Kconfig"

choice

2006-10-02 15:56:19

by Randy Dunlap

Subject: Re: [PATCH] FRV: Permit large kmalloc allocations

On Mon, 02 Oct 2006 16:37:08 +0100 David Howells wrote:

> From: David Howells <[email protected]>
>
> Permit kmalloc() to make allocations of up to 32MB if so configured. This may
> be useful under NOMMU conditions where vmalloc() can't do this.
>
> Signed-Off-By: David Howells <[email protected]>
> ---
>
> arch/frv/Kconfig | 8 ++++++++
> 1 files changed, 8 insertions(+), 0 deletions(-)
>
> diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
> index f7b171b..69f9846 100644
> --- a/arch/frv/Kconfig
> +++ b/arch/frv/Kconfig
> @@ -86,6 +86,14 @@ config HIGHPTE
> with a lot of RAM, this can be wasteful of precious low memory.
> Setting this option will put user-space page tables in high memory.
>
> +config LARGE_ALLOCS
> + bool "Allow allocating large blocks (> 1MB) of memory"
> + help
> + Allow the slab memory allocator to keep chains for very large memory
> + sizes - upto 32MB. You may need this if your system has a lot of RAM,

up to (2 words)

> + and you need to able to allocate very large contiguous chunks. If
> + unsure, say N.
> +
> source "mm/Kconfig"



---
~Randy

2006-10-02 16:27:42

by David Howells

Subject: Re: [PATCH] FRV: Permit large kmalloc allocations

Randy Dunlap <[email protected]> wrote:

> > + sizes - upto 32MB. You may need this if your system has a lot of RAM,
>
> up to (2 words)

Altered, thanks.

David