| Date | Mon, 25 Jun 2012 21:57:54 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [PATCH 11/11] protect architectures where THREAD_SIZE >= PAGE_SIZE against fork bombs |
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On Mon, 25 Jun 2012, Glauber Costa wrote:
> diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h > index ccc1899..914ec07 100644 > --- a/include/linux/thread_info.h > +++ b/include/linux/thread_info.h > @@ -61,6 +61,12 @@ extern long do_no_restart_syscall(struct restart_block *parm); > # define THREADINFO_GFP (GFP_KERNEL | __GFP_NOTRACK) > #endif > > +#ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM > +# define THREADINFO_GFP_ACCOUNTED (THREADINFO_GFP | __GFP_KMEMCG) > +#else > +# define THREADINFO_GFP_ACCOUNTED (THREADINFO_GFP) > +#endif > +
This type of requirement is going to become nasty very quickly if nobody can use __GFP_KMEMCG without testing for CONFIG_CGROUP_MEM_RES_CTLR_KMEM. Perhaps define __GFP_KMEMCG to be 0x0 if it's not enabled, similar to how kmemcheck does?
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