On Wed, 28 Jul 2010 17:56:23 +0100 Steven Whitehouse <swhit...@redhat.com>
wrote:
> +static void *gfs2_alloc_sort_buffer(unsigned size)
> +{
> + void *ptr = NULL;
> +
> + if (size < KMALLOC_MAX_SIZE)
> + ptr = kmalloc(size, GFP_NOFS | __GFP_NOWARN);
> + if (!ptr)
> + ptr = __vmalloc(size, GFP_NOFS, PAGE_KERNEL);
> + return ptr;
> +}
> +
> +static void gfs2_free_sort_buffer(void *ptr)
> +{
> + if (is_vmalloc_addr(ptr))
> + vfree(ptr);
> + else
> + kfree(ptr);
> +}
This got kicked around a bit in May (Subject: mm: generic adaptive
large memory allocation APIs). That patch tried kmalloc(), then
alloc_pages(), then vmalloc(). Nothing got merged though.
I wasn't terribly excited about it because of vague fears that it would
just incite people to spend even less effort thinking about how large
their individual allocations are.
apparmor has a private kvfree/kvmalloc. Probably there are other
versions floating around the tree as well.
