Re: swapper: page allocation failure.

From: Haar János
Date: Sun May 21 2006 - 05:31:14 EST



----- Original Message -----
From: "Chris Wedgwood" <cw@xxxxxxxx>
To: "Haar J?nos" <djani22@xxxxxxxxxxxx>
Cc: <linux-kernel@xxxxxxxxxxxxxxx>
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

>

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