Hi John,
the change in Saucy was that the config was altered so that it was
used during the desktop install (Ubiquity), before that it was there
just not used for the task of allowing ubiquity to run and install
onto a system that we had the crazy situation of the installer needing
more RAM than the actual installed system needs.
The testing team did many tests to find out just how low we could go
with 'desktop installer'. They found ~ 384MB to be the minimum for it.
As a server person, I use the alternate installs, but the desktop one
is more new comer friendly :)
Regards,
Phill.
On 28 September 2013 00:06, John Hupp <lubuntu@xxxxxxxxxxxxxx
<mailto:lubuntu@xxxxxxxxxxxxxx>> wrote:
The news/announcements concerning Saucy tend to say something "new
in Saucy ... zRAM."
But zram-config is installed in my Raring i386 standard desktop
installation, and I didn't install it unless it came along as a
dependency for something.
On 9/27/2013 6:29 PM, Nio Wiklund wrote:
Sorry, I overlooked that John is running Raring. I didn't
think zRAM was
used in Raring, but of course, John can install and run it.
I'm glad you
corrected that mistake by me.
Best regards
Nio
On 2013-09-28 00:08, Phill Whiteside wrote:
hi Nio,
he is running Raring. The bug we see in Saucy on 1227202
is totally
un-related to the sudo parted -l issue.
Getting the race issue sorted out on un-mounting the zram
areas is what
the bug fix is. With all the tests I've done, the
Error: /dev/zram0: unrecognised disk label
Error: /dev/zram1: unrecognised disk label
Has remained until I used the 3.12rc kernel. We will go
battle that
issue on Monday to see if we can find the fix. Also do
read
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1215379
as we
may be barking up the wrong tree with zram, and should be
using zswap.
Joe cannot tell us which is better to use, just that zswap
was in the
3.11.2 upstream kernel which has been imported into the latest
3.11.0-9.16 kernel.
It was Unit193 who pointed that issue out, and whilst
getting the race
crash sorted out, it appears that zswap is the updated system.
Regards,
Phill.
On 27 September 2013 22:54, Nio Wiklund
<nio.wiklund@xxxxxxxxx <mailto:nio.wiklund@xxxxxxxxx>
<mailto:nio.wiklund@xxxxxxxxx
<mailto:nio.wiklund@xxxxxxxxx>>> wrote:
On 2013-09-27 23:28, John Hupp wrote:
> On Raring, output from 'sudo parted -l' includes:
>
> Error: /dev/zram0: unrecognised disk label
>
> And syslog shows a slew of errors:
>
> Lubuntu kernel: Buffer I/O error on device
zram0, logical
block 128247
>
> Syslog also indicates that half of memory was given
to zram to
form its
> block device.
>
> Does this mean that half of memory is dedicated to
something that
isn't
> working? And perhaps that machines will hang when
swap is needed?
>
> I arrive at this line of questioning because I was
testing an LTSP
> client using a Lubuntu LTSP server configured with
1 GB, and when
I drop
> the client memory configuration to 256 MB, the
*server* has hung on
> several occasions when I was starting or stopping
Firefox on the
client
> (though in one case this coincided with the startup
of a SpiderOak
> backup operation). I didn't think of the Magic
SysRq keys at the
time,
> and nothing else was responding, so I did hard
shutdowns.
>
> I saw a post from Phill Whiteside recently
concerning a rush of
activity
> re a zram bug, but it seemed to be directed at Saucy.
>
> Are there solutions/workarounds?
>
You find a lot of details reading the comments about
this bug.
https://bugs.launchpad.net/bugs/1227202
There is a kernel in the pipeline, that we think will
solve most if not
all of the problems. Until we get the kernel that can
cooperate with
zRAM, you can switch it off either manually or with
crontab like this:
guru@Lubuntu-Saucy-b2:~$ sudo crontab -l |tail -n3
# m h dom mon dow command
@reboot /sbin/swapoff /dev/zram*
@reboot /sbin/rmmod zram
Best regards
Nio
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