Swap Space Not Being Used?

[Tod Merley]

On 9/21/06, Rick Bilonick <rab at nauticom.net> wrote:
> On Thu, 2006-09-21 at 16:04 -0600, Charles Curley wrote:
> > On Thu, Sep 21, 2006 at 05:33:40PM -0400, RICHARD wrote:
> > > I'm using FC4 on a Dell Inspiron 2200 (for over 1 year). OOo has started
> > > crashing when working with inserting large picture files (although I've
> > > worked with them in the past without problem). I noticed in xosview that
> > > the physical memory (0.5GB) quickly goes up near the maximum and then OOo
> > > exits. I also noticed that the swap space (which I believe is about 1GB)
> > > always shows exactly zero. (On a 2gb memory dual opteron system, xosview
> > > reports 845mb.) Shouldn't xosview show some swap space being used?
> >
> > I don't know about xosview, as I don't use it. But free might or might
> > not show any swap in use during normal usage. e.g:
> >
> > $ free -m
> >              total       used       free     shared    buffers     cached
> > Mem:          1519       1484         35          0        193        852
> > -/+ buffers/cache:        437       1081
> > Swap:         4094          1       4093
> >
> > shows four GB of swap mounted and one megabyte of swap in use.
> >
> > # free -m
> >              total       used       free     shared    buffers     cached
> > Mem:           234        230          4          0         26         60
> > -/+ buffers/cache:        143         91
> > Swap:            0          0          0
> >
> > shows swap off.
> >
> > >
> > > Here is the partition table reported by fdisk:
> > >
> >
> > >    Device Boot      Start         End      Blocks   Id  System
> >
> > > /dev/hda6            2570        2697     1028128+  82  Linux swap /
> > > Solaris
> >
> > > Any ideas on how I can check on whether swap is being used and/or turn
> > > sway back on if it is actually not being used?
> >
> > First, to ensure that swap is turned on at boot, be sure it is in
> > /etc/fstab. e.g I have:
> >
> > LABEL=SWAP-hda6  swap       swap    defaults        0 0
> >
> > or maybe, if you aren't a fan of disk labels:
> >
> > /dev/hda6        swap       swap    defaults        0 0
> >
> > Then simply run:
> >
> > swapon /dev/hda6
> >
> > to get it running. No response, in Unix tradition, indicates
> > success. If swap is already enabled on that partition, you'll see:
> >
> > # swapon /dev/hda6
> > swapon: /dev/hda3: Device or resource busy
> >
> > --
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>
> I can't get swapon to work and I'm sure swap is off.
>
> [root at ophth-bilora chippy]# free -m
>              total       used       free     shared    buffers
> cached
> Mem:           495        487          7          0         26
> 203
> -/+ buffers/cache:        258        237
> Swap:            0          0          0
> [root at ophth-bilora chippy]# /sbin/swapon /dev/hda6
> swapon: /dev/hda6: Invalid argument
>
>
> [root at ophth-bilora chippy]# cat /etc/fstab
> # This file is edited by fstab-sync - see 'man fstab-sync' for details
> /dev/VolGroup00/LogVol00 /                       ext3    defaults
> 1 1
> LABEL=/boot             /boot                   ext3    defaults
> 1 2
> /dev/devpts             /dev/pts                devpts  gid=5,mode=620
> 0 0
> /dev/shm                /dev/shm                tmpfs   defaults
> 0 0
> /dev/proc               /proc                   proc    defaults
> 0 0
> /dev/sys                /sys                    sysfs   defaults
> 0 0
> LABEL=SWAP-hda6         swap                    swap    defaults
> 0 0
> /dev/hda2               /mnt/windows            ntfs    ro,umask=0222
> 0 0
> /dev/hdb                /media/cdrecorder       auto
> pamconsole,exec,noauto,managed 0 0
>
>
> Here is what dmesg shows:
>
> Kernel command line: ro root=/dev/VolGroup00/LogVol00 rhgb quiet
> resume2=swap:/dev/hda6
> audit(1158897380.741:4): avc:  denied  { unlink } for  pid=1852
> comm="swapon" name="blkid.tab.old" dev=dm-0 ino=1733754
> scontext=system_u:system_r:fsadm_t tcontext=root:object_r:etc_t
> tclass=file
> Unable to find swap-space signature
> Unable to find swap-space signature
> Unable to find swap-space signature
> Unable to find swap-space signature
> Unable to find swap-space signature
> Unable to find swap-space signature
>
>
> A few days ago (right before this problem started), I installed acpitool
> and I tried to do a suspend (which didn't work). I think that screwed
> something up!
>
> Rick B.
>
>
>
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>

Hi Rick Bilonick!

When I see "avc:  denied" I think SELinux.  Try putting it into
permissive mode.  Then Google the "avc:  denied" error adding and
subtracting error information as your search yeilds fruit.

Good Hunting!

Tod