[rhelv6-list] Problems resizing tmpfs under RHEL6

[carlopmart]

On 02/23/2011 11:28 AM, Udo wrote:
> Am Mittwoch, den 23.02.2011, 10:13 +0100 schrieb carlopmart:
>>>
>>> Hi,
>>>
>>> it is a freshly installed RHEL6-x86_64 from iso without updates.
>>> The changes are only in /etc/fstab, as you can see above, and a remount command.
>>>
>>> Udo
>>>
>>>
>>
>> Do you need to execute remount command after host is up?? I need to run every time
>> when laptop is up.
>>
>> Thanks.
>>
>
> Oh sorry,
>
> I didn't realized that you only have the problem after a reboot.
> After a reboot I have the same effect.
>
> But the following patch correct it.
> The backshlashes marks the linebreak.
>
> --- /etc/rc.d/rc.sysinit.orig   2010-09-01 18:15:50.000000000 +0200
> +++ /etc/rc.d/rc.sysinit        2011-02-23 11:07:12.544475820 +0100
> @@ -487,7 +487,7 @@
>          mount -f /proc>/dev/null 2>&1
>          mount -f /sys>/dev/null 2>&1
>          mount -f /dev/pts>/dev/null 2>&1
> -       mount -f /dev/shm>/dev/null 2>&1
> +       #mount -f /dev/shm>/dev/null 2>&1
>          mount -f /proc/bus/usb>/dev/null 2>&1
>   fi
>
> @@ -495,7 +495,7 @@
>   # mounted). Contrary to standard usage,
>   # filesystems are NOT unmounted in single user mode.
>   if [ "$READONLY" != "yes" ] ; then
> -       action $"Mounting local filesystems: " mount -a -t \
> nonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdev
> +       action $"Mounting local filesystems: " mount -a -t \
> tmpfs,nonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdev
>   else
>          action $"Mounting local filesystems: " mount -a -n -t \
> nonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdev
>   fi
>
>
> If the mount point is different, it works as expected after a reboot
> (unpatched rc.sysinit).
>
> cat /etc/fstab |grep tmpfs
> tmpfs    /dev/shm    tmpfs   defaults,size=66%        0 0
> tmpfs    /mnt/tmpfs  tmpfs   defaults,size=33%        0 0
>
> df -h | grep tmpfs
> tmpfs        1,5G   26M  1,5G   2% /dev/shm
> tmpfs        984M     0  984M   0% /mnt/tmpfs
>
>
> It's a bug or a feature?
>
>
> The command /bin/mount -o remount /dev/shm
> in /etc/rc.d/rc.local solve your problem.
>
>
> Udo
>
>

In my opinion it is a bug, because under RHEL5.x works perfectly.

Many thanks Udo.

-- 
CL Martinez
carlopmart {at} gmail {d0t} com