lkml.org 
[lkml]   [2006]   [May]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: swapper: page allocation failure.
Date

----- Original Message -----
From: "Con Kolivas" <kernel@kolivas.org>
To: <linux-kernel@vger.kernel.org>
Cc: "Haar János" <djani22@netcenter.hu>; "Nick Piggin"
<nickpiggin@yahoo.com.au>; <cw@f00f.org>
Sent: Monday, May 22, 2006 1:17 PM
Subject: Re: swapper: page allocation failure.


> On Monday 22 May 2006 17:41, Haar János wrote:
> > ----- Original Message -----
> > From: "Nick Piggin" <nickpiggin@yahoo.com.au>
> > > Yeah, as I said, block device's pagecache (aka buffercache) can't
> > > use highmem. If nbd can export regular files as block devices, or
> > > you use loop devices from regular files, that might help (or slow
> > > things down :P).
> >
> > Hmm.
> > That sounds bad.
> > I think, if highmem is unreachable some times that makes lowmem more
> > valuable!
> > The kernel needs to keep (reserve) it free as much as possible.
> > The buffer-cache is an unimportant thing next to keeping lowmem free,
but
> > it is blocks the performance and wastes the systems resources!
> >
> > It is possible any workaround?
>
> Try with one of the alternative vmsplit options that gives you more
lowmem?
> That might break certain applications though.

total used free shared buffers cached
Mem: 4049724 4021196 28528 0 16384 3217288
Low: 4049724 4021196 28528
High: 0 0 0
-/+ buffers/cache: 787524 3262200
Swap: 0 0 0

This is an 64 bit machine, the "concentrator".

It looks like use all, the 4G ram as "lowmem".
If i replace the cpu on my nodes to 64bit capable ones, i can use all the
memory as buffer-cache? :-)

Cheers,
Janos



>
> --
> -ck
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-05-22 17:12    [W:0.160 / U:0.360 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site