Re: [PATCH] Move page_assign_page_cgroup to VM_BUG_ON in free_hot_cold_page

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, 2007-12-19 at 11:48 +0530, Balbir Singh wrote:
> diff -puN mm/page_alloc.c~memory-controller-move-to-bug-on-in-free_hot_cold_page mm/page_alloc.c
> --- linux-2.6.24-rc5/mm/page_alloc.c~memory-controller-move-to-bug-on-in-free_hot_cold_page     2007-12-19 11:31:46.000000000 +0530
> +++ linux-2.6.24-rc5-balbir/mm/page_alloc.c     2007-12-19 11:33:45.000000000 +0530
> @@ -995,7 +995,7 @@ static void fastcall free_hot_cold_page(
>  
>         if (!PageHighMem(page))
>                 debug_check_no_locks_freed(page_address(page), PAGE_SIZE);
> -       page_assign_page_cgroup(page, NULL);
> +       VM_BUG_ON(page_get_page_cgroup(page));
>         arch_free_page(page, 0);
>         kernel_map_pages(page, 1, 0); 

Hi Balbir,

You generally want to do these like:

	foo = page_assign_page_cgroup(page, NULL);
	VM_BUG_ON(foo);

Some embedded people have been known to optimize kernel size like this:

	#define VM_BUG_ON(x) do{}while(0)

-- Dave

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux