Re: swapper: page allocation failure.

["Haar János" <djani22@netcenter.hu>]

----- Original Message ----- 
From: "Chris Wedgwood" <cw@f00f.org>
To: "Haar J?nos" <djani22@netcenter.hu>
Cc: <linux-kernel@vger.kernel.org>
Sent: Sunday, May 21, 2006 11:10 AM
Subject: Re: swapper: page allocation failure.


> On Sun, May 21, 2006 at 11:03:33AM +0200, Haar J?nos wrote:
>
> > MemTotal:      2073048 kB
> > MemFree:       1179376 kB
>
> fine
>
> > Buffers:        829764 kB
>
> ok
>
> > Cached:          19896 kB
> > SwapCached:          0 kB
> > Active:          15604 kB
>
> > Inactive:       837636 kB
>
> hrm
>
> > HighTotal:     1179584 kB
> > HighFree:      1154736 kB
>
> krm
>
> > LowTotal:       893464 kB
> > LowFree:         24640 kB
>
> bad
>
> > SwapTotal:           0 kB
> > SwapFree:            0 kB
>
> ok
>
> > Dirty:           21352 kB
>
> ok
>
> > Writeback:           0 kB
> > Mapped:           7000 kB
> > Slab:            22612 kB
>
> ok
>
>
>
>
> you have very little low
>
>
> > Not installed.
>
> urgh
>
> > Wich package or where can i find the source? (i use redhat 9.0)
>
> google i guess, i have very little idea how to drive RH to be honest
>
> anyhow, it's not the slab

I found it already, thanks.

>
>
> something is eating/using/leaking all your lowmemory
>
>
> what kernel version is this?

[root@st-0001 /]# uname -a
Linux st-0001 2.6.17-rc3-git1 #2 SMP Sun May 21 01:12:22 CEST 2006 i686 i686
i386 GNU/Linux

> how long has the machine been up?

[root@st-0001 /]# uptime
 11:22:10 up  2:52,  1 user,  load average: 0.35, 0.42, 0.43



> do you see it get worse over time?

No.
This is a simple disk node.
It serves the md0 array, and uses mem for buffering-caching.
If it reboots, fill the memory on the first couple of minutes, and stay on
full, but this is relatively good.

But 2 question is remaining:

1. why don't use highmem for caching?
2. why can not allocate enough lowmem from shared-buffer for the e1000
driver if it needs some memory?

Cheers,
Janos

>