Re: [patch] vmstat: account page allocation failures

[KOSAKI Motohiro]

>  nopage:
> +	inc_zone_state(preferred_zone, NR_ALLOC_FAIL);
> +	/* count_zone_vm_events(PGALLOCFAIL, preferred_zone, 1 << order); */
>  	if (!(gfp_mask & __GFP_NOWARN) && printk_ratelimit()) {
>  		unsigned int filter = SHOW_MEM_FILTER_NODES;
>  
> --- linux-next.orig/mm/vmstat.c	2011-04-28 21:34:30.000000000 +0800
> +++ linux-next/mm/vmstat.c	2011-04-28 21:34:35.000000000 +0800
> @@ -879,6 +879,7 @@ static const char * const vmstat_text[] 
>  	"nr_shmem",
>  	"nr_dirtied",
>  	"nr_written",
> +	"nr_alloc_fail",

I'm using very similar patch for debugging. However, this is useless for
admins because typical linux load have plenty GFP_ATOMIC allocation failure.
So, typical user have no way that failure rate is high or not.




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