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From: Jiri Slaby <jslaby@suse.cz>
To: Hillf Danton <dhillf@gmail.com>
Cc: Daniel J Blueman <daniel@numascale-asia.com>,
	Linux Kernel <linux-kernel@vger.kernel.org>,
	Steffen Persvold <sp@numascale.com>, mm <linux-mm@kvack.org>,
	Mel Gorman <mgorman@suse.de>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: kswapd craziness round 2
Date: Sat, 09 Mar 2013 00:21:07 +0100	[thread overview]
Message-ID: <513A7263.5090303@suse.cz> (raw)
In-Reply-To: <CAJd=RBC6JzXzPn9OV8UsbEjX152RcbKpuGGy+OBGM6E43gourQ@mail.gmail.com>

On 03/08/2013 07:42 AM, Hillf Danton wrote:
> On Fri, Mar 8, 2013 at 3:37 AM, Jiri Slaby <jslaby@suse.cz> wrote:
>> On 03/01/2013 03:02 PM, Hillf Danton wrote:
>>> On Fri, Mar 1, 2013 at 1:02 AM, Jiri Slaby <jslaby@suse.cz> 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]
>>
> Double thanks.

There is one downside. I'm not sure whether that patch was the culprit.
My Thunderbird is jerky when scrolling and lags while writing this
message. The letters sometimes appear later than typed and in groups. Like
I (kbd): My Thunder
TB: My Thunder
I (kbd): b-i-r-d
TB: is silent
I (kbd): still typing...
TB: bird is

Perhaps it's not only TB.

> But Mel does not like it, probably.
> Lets try nap in another way.

Will try next week.

> --- a/mm/vmscan.c	Thu Feb 21 20:01:02 2013
> +++ b/mm/vmscan.c	Fri Mar  8 14:36:10 2013
> @@ -2793,6 +2793,10 @@ loop_again:
>  				 * speculatively avoid congestion waits
>  				 */
>  				zone_clear_flag(zone, ZONE_CONGESTED);
> +
> +			else if (sc.priority > 2 &&
> +				 sc.priority < DEF_PRIORITY - 2)
> +				wait_iff_congested(zone, BLK_RW_ASYNC, HZ/10);
>  		}
> 
>  		/*

-- 
js
suse labs

WARNING: multiple messages have this Message-ID (diff)
From: Jiri Slaby <jslaby@suse.cz>
To: Hillf Danton <dhillf@gmail.com>
Cc: Daniel J Blueman <daniel@numascale-asia.com>,
	Linux Kernel <linux-kernel@vger.kernel.org>,
	Steffen Persvold <sp@numascale.com>, mm <linux-mm@kvack.org>,
	Mel Gorman <mgorman@suse.de>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: kswapd craziness round 2
Date: Sat, 09 Mar 2013 00:21:07 +0100	[thread overview]
Message-ID: <513A7263.5090303@suse.cz> (raw)
In-Reply-To: <CAJd=RBC6JzXzPn9OV8UsbEjX152RcbKpuGGy+OBGM6E43gourQ@mail.gmail.com>

On 03/08/2013 07:42 AM, Hillf Danton wrote:
> On Fri, Mar 8, 2013 at 3:37 AM, Jiri Slaby <jslaby@suse.cz> wrote:
>> On 03/01/2013 03:02 PM, Hillf Danton wrote:
>>> On Fri, Mar 1, 2013 at 1:02 AM, Jiri Slaby <jslaby@suse.cz> 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]
>>
> Double thanks.

There is one downside. I'm not sure whether that patch was the culprit.
My Thunderbird is jerky when scrolling and lags while writing this
message. The letters sometimes appear later than typed and in groups. Like
I (kbd): My Thunder
TB: My Thunder
I (kbd): b-i-r-d
TB: is silent
I (kbd): still typing...
TB: bird is

Perhaps it's not only TB.

> But Mel does not like it, probably.
> Lets try nap in another way.

Will try next week.

> --- a/mm/vmscan.c	Thu Feb 21 20:01:02 2013
> +++ b/mm/vmscan.c	Fri Mar  8 14:36:10 2013
> @@ -2793,6 +2793,10 @@ loop_again:
>  				 * speculatively avoid congestion waits
>  				 */
>  				zone_clear_flag(zone, ZONE_CONGESTED);
> +
> +			else if (sc.priority > 2 &&
> +				 sc.priority < DEF_PRIORITY - 2)
> +				wait_iff_congested(zone, BLK_RW_ASYNC, HZ/10);
>  		}
> 
>  		/*

-- 
js
suse labs

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  parent reply	other threads:[~2013-03-08 23:21 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-18  6:18 kswapd craziness round 2 Daniel J Blueman
2013-02-18 11:42 ` Hillf Danton
2013-02-18 15:05   ` Daniel J Blueman
2013-02-20 22:14   ` Jiri Slaby
2013-02-21 12:07     ` Hillf Danton
2013-02-24 21:27       ` Jiri Slaby
2013-02-28 17:02       ` Jiri Slaby
2013-03-01 14:02         ` Hillf Danton
2013-03-07 19:37           ` Jiri Slaby
2013-03-08  6:42             ` Hillf Danton
2013-03-08  6:42               ` Hillf Danton
2013-03-08  7:29               ` Zlatko Calusic
2013-03-08  7:29                 ` Zlatko Calusic
2013-03-08  8:27                 ` Hillf Danton
2013-03-08  8:27                   ` Hillf Danton
2013-03-08 23:21               ` Jiri Slaby [this message]
2013-03-08 23:21                 ` Jiri Slaby
2013-03-19 16:59                 ` Pádraig Brady
2013-03-19 16:59                   ` Pádraig Brady
2013-03-20  4:12                   ` Hillf Danton
2013-03-20  4:12                     ` Hillf Danton
2013-03-20  8:39                     ` Jiri Slaby
2013-03-20  8:39                       ` Jiri Slaby
  -- strict thread matches above, loose matches on Subject: below --
2013-02-17 22:02 Jiri Slaby
2013-02-17 22:02 ` Jiri Slaby

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