Re: [RFC] mm: generic adaptive large memory allocation APIs

[Changli Gao <xiaosuo@gmail.com>]

On Thu, May 6, 2010 at 8:30 AM, Changli Gao <xiaosuo@gmail.com> wrote:
> kvmalloc() will try to allocate physically contiguous memory first, and try
> vmalloc to allocate virtually contiguous memory when the former allocation
> fails.
>
> kvfree() is used to free the memory allocated by kvmalloc(). It can't be used
> in atomic context. If the callers are in atomic contex, they can use
> kvfree_inatomic() instead.
>
> There is much duplicate code to do such things in kernel, so I generate the
> above APIs.
>
> Thank Eric Dumazet for the "kv" prefix. :)
>
> #include <linux/kernel.h>
> #include <linux/module.h>
> #include <linux/mm.h>
> #include <linux/init.h>
> #include <linux/slab.h>
> #include <linux/vmalloc.h>
> #include <linux/interrupt.h>
>
> void *kvmalloc(size_t size)
> {
>        void *ptr;
>
>        if (size < PAGE_SIZE)
>                return kmalloc(PAGE_SIZE, GFP_KERNEL);

typo mistake, should be kmalloc(size, GFP_KERNEL), thank Tetsuo Handa
<penguin-kernel@i-love.sakura.ne.jp>.



-- 
Regards，
Changli Gao(xiaosuo@gmail.com)