Re: kswapd craziness round 2

[Jiri Slaby]

On 03/01/2013 03:02 PM, Hillf Danton wrote:
> On Fri, Mar 1, 2013 at 1:02 AM, Jiri Slaby <jslaby@xxxxxxx> wrote:
>>
>> Ok, no difference, kswap is still crazy. I'm attaching the output of
>> "grep -vw '0' /proc/vmstat" if you see something there.
>>
> Thanks to you for test and data.
> 
> Lets try to restore the deleted nap, then.

Oh, it seems to be nice now:
root       579  0.0  0.0      0     0 ?        S    Mar04   0:13 [kswapd0]

Thanks.

> Hillf
> --- a/mm/vmscan.c	Thu Feb 21 20:01:02 2013
> +++ b/mm/vmscan.c	Fri Mar  1 21:55:40 2013
> @@ -2817,6 +2817,10 @@ loop_again:
>  		 */
>  		if (sc.nr_reclaimed >= SWAP_CLUSTER_MAX)
>  			break;
> +
> +		if (sc.priority < DEF_PRIORITY - 2)
> +			congestion_wait(BLK_RW_ASYNC, HZ/10);
> +
>  	} while (--sc.priority >= 0);
> 
>  out:
> --
> 


-- 
js
suse labs
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