Re: [PATCH] memcg: avoid "free" overflow inmemcg_hierarchical_free_pages()

[KAMEZAWA Hiroyuki]

On Tue,  9 Nov 2010 00:54:13 -0800
Greg Thelen <gthelen@xxxxxxxxxx> wrote:

> memcg limit and usage values are stored in res_counter, as 64-bit
> numbers, even on 32-bit machines.  The "free" variable in
> memcg_hierarchical_free_pages() stores the difference between two
> 64-bit numbers (limit - current_usage), and thus should be stored
> in a 64-bit local rather than a machine defined unsigned long.
> 
> Reported-by: Daisuke Nishimura <nishimura@xxxxxxxxxxxxxxxxx>
> Signed-off-by: Greg Thelen <gthelen@xxxxxxxxxx>

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>

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