Hi Leszek, at this point in 13.10 I'm already thinking ahead to 14.04 :) Asking Julien to investigate the merits as we will be using the 3.12 kernel in 14.04 makes sense to me :)
I've run the 3.12rc2 for a week on my system, before reverting to the current 'test' 3.11 kernel with the zram chase fixed, and it's looking darn good! Regards, Phill. On 28 September 2013 19:51, Leszek Lesner <[email protected]> wrote: > Am 28.09.2013 18:27, schrieb Phill Whiteside: > > Hi John, > > > > just to add to the fun, unit193 found this.... > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1215379 So, I don't > > know if we should be using zram or zswap now! It needs looking into by > > someone with more skilled than me (shouldn't be too hard to find one of > > those!). Joe from the kernel team simply said that is for the flavours to > > decide what they use, they just make the kernel :D I've asked Julien to > > have a look into the matter. The chase that zram was experiencing in the > > 3.11 kernels has a fix, the other issues are separate bugs and it seems > > like they have been around for several cycles. It's amazing what > skeletons > > come out of the cupboard when someone rattles it hard! > > > > ZSwap is fairly new and not tested yet. zram however is widely tested > and it was stable (I have been using it on my phone from kernel 2.6.32 > on and later on my laptop in the 3.x cycles) until 3.10.6. So I guess we > should stick with zram for this release and then later test other > solutions aswell. Besides zswap there is also zcache btw. we even might > combine zcache and zram/zswap if we want but that all needs to be tested > first and currently either zswap nor zcache are really tested as they > are fairly new. > > > > > > > On 28 September 2013 17:10, John Hupp <[email protected]> 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< > 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 <[email protected] > >>>>>> <mailto:[email protected]>**> 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< > 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 > >>>>>> [email protected] > >>>>>> <mailto:Lubuntu-users@lists.**ubuntu.com< > [email protected]> > >>>>>>> > >>>>>> Modify settings or unsubscribe at: > >>>>>> https://lists.ubuntu.com/**mailman/listinfo/lubuntu-users< > https://lists.ubuntu.com/mailman/listinfo/lubuntu-users> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> -- > >>>>>> https://wiki.ubuntu.com/phillw > >>>>>> > >>>>> > >> > > > > > > > > > > > -- > Lubuntu-users mailing list > [email protected] > Modify settings or unsubscribe at: > https://lists.ubuntu.com/mailman/listinfo/lubuntu-users > > -- > https://wiki.ubuntu.com/phillw > <https://lists.ubuntu.com/mailman/listinfo/lubuntu-users> >
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