From owner-freebsd-questions@FreeBSD.ORG  Sat Aug 25 05:56:59 2007
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Date: Sat, 25 Aug 2007 05:56:59 +0000
From: Kris Kennaway <kris@FreeBSD.org>
To: Norberto Meijome <freebsd@meijome.net>
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Cc: User Questions <freebsd-questions@freebsd.org>,
	Roger Olofsson <raggen@passagen.se>
Subject: Re: FreeBSD and ImageMagick crashes OS?
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On Fri, Aug 24, 2007 at 08:26:50PM +1000, Norberto Meijome wrote:
> On Fri, 24 Aug 2007 11:29:59 +0200
> Roger Olofsson <raggen@passagen.se> wrote:
> 
> > Turns out ImageMagick was called through php to resize the .JPG and most 
> > likely, the server runs out of memory/disk space. /var/tmp fills up and 
> > console spews as follows:
> > 
> > Aug 22 19:29:49 rutilus kernel: vnode_pager_putpages: I/O error 28
> > Aug 22 19:29:49 rutilus kernel: vnode_pager_putpages: residual I/O 32768 
> > at 62620
> > Aug 22 19:29:49 rutilus kernel: pid 29 (syncer), uid 0 inumber 49382 on 
> > /var: filesystem full
> 
> :) having been bitten by that in several unix-like OS (pick any Linux distro, and freebsd too), i just remove /var/tmp and make a smylink to /tmp , which is big enough for my foreseeable needs. I like to keep my /var clean of tmp rubbish.
> 
> and yes,  configuring PHP and it's libraries helps too :)

That's not an answer obviously.  Error 28 is

#define ENOSPC          28              /* No space left on device */

This seems like a bug to me: when a filesystem fills you shouldn't be
getting this behaviour.  Can you please follow the directions in the
developers handbook chapter on kernel debugging, and when you trigger
a hang, break to DDB from the console and force a dump, then file a PR
and make the core file available to the developers.  Unfortunately
unless a developer can replicate the behaviour, providing access to a
core is the only real debugging option.

Thanks,
Kris