Hi John, Yes, let us hope the bug will be fixed soon, and it will be back-ported :-)
Can you run your application without zRAM? You can switch it off in a simple way (and have it ready for reactivation) like this with crontab. Edit the crontab with sudo crontab -e $ sudo crontab -l |tail -n3 # m h dom mon dow command @reboot /sbin/swapoff /dev/zram* @reboot /sbin/rmmod zram Best regards Nio On 28/09/13 18:10, John Hupp wrote: > Hi, Nio. > > That is what puzzled me about Phill's statement that before Saucy, > zram "was there just not used." > > Your confirmation that it is not used in your up-to-date Raring > install sent me looking for a package that depends on zram-config. I > did a Dependencies search in Synaptic and found out that my installed > ltsp-client package Recommends zram-config. > > The nicest solution scenarios would be that zram is fixed in time for > the Saucy release (there is hope?) and that it is almost > simultaneously backported to Raring (there is hope?). > > But in the meantime I suppose I'll need to talk to the LTSP folks > about what might be done if neither of the above happens quickly. > > --John > > On 9/28/2013 4:04 AM, Nio Wiklund wrote: >> Hi John, >> >> I checked in an up to date (update + dist-upgrade) Lubuntu Raring i386 >> standard desktop installation. I find no zRAM block devices, no >> zram-config, and nothing else, that indicates that zram should be >> activated. The kernel is 3.8.0.31 #46 according to uname. >> >> guru@pae4pm:~$ uname -a >> Linux pae4pm 3.8.0-31-generic #46-Ubuntu SMP Tue Sep 10 19:56:49 UTC >> 2013 i686 i686 i686 GNU/Linux >> >> I think your zRAM 'came along as a dependency for something'. Maybe you >> have installed some ppa or other special repository to get new kernels >> or other new packages. What version is the kernel in your system? >> >> Best regards >> Nio >> >> On 2013-09-28 01:06, John Hupp 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.wikl...@gmail.com >>>>> <mailto:nio.wikl...@gmail.com>> 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 >>>>> >>>>> -- >>>>> Lubuntu-users mailing list >>>>> Lubuntu-users@lists.ubuntu.com >>>>> <mailto:Lubuntu-users@lists.ubuntu.com> >>>>> Modify settings or unsubscribe at: >>>>> https://lists.ubuntu.com/mailman/listinfo/lubuntu-users >>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> https://wiki.ubuntu.com/phillw > -- Lubuntu-users mailing list Lubuntu-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/lubuntu-users
