Re: btrfs, gnome-shell 3.26 and extensions / was: Re: Fw: Gnome extensions

[François Guerraz <kubrick fgv6 net>]

Hi there,

Just my two cents here on BTRFS and desktop interactivity issues.

I have had many "lock up" issues one one of my systems, leading in Firefox crashes and various oddities.

This system has a rather large amount of memory (64GB) and it turned out write-back on BTRFS was the issue. 
Tuning the vm_dirty_* settings helped mitigate the problem and anyways, the defaults are woefully inadequate 
for desktop systems with a lot of RAM and SSDs.

Could people who are experiencing problems reporting their VM settings, amount of RAM, mount options and if 
the problem is more likely to occur on write intensive workloads?

Best regards, 
François 


On 6 Oct 2017, Olaf Leidinger <oleid mescharet de> wrote:
> Hey Leslie,
>
> what extensions are you using? I just installed gnome-shell-3.26 from
> Arch Linux's testing repos and it's working fine for me using btrfs.
> gnome-shell is hardly visible via 'top'.
>
> Kind regards,
> Olaf
>
> Am 06.10.2017 um 03:46 schrieb Leslie S Satenstein via
> gnome-shell-list:
> > Do not (as 5 October) use Gnome with btrfs.  You can experience
> > gnome-shell looping with 99% cpu busy,  schemas not being adhered to,
> > and problems because btrfs uses copy-on-write.  I have 5 copies of
> > Gnome 3.26 with ext4, brtfs fully, btrrs with xfs for /home  and
> more.
> > I can substantiate the btrfs problem. Like any scientific experiment,
> > you can duplicate my findings.
> >
> > Gnome is safe with  a non "copy on write" file system.
> >  
> > Regards
> > *
> >  Leslie
> > *
> > *Leslie Satenstein*
> > *Montréal Québec, Canada*
> >
> > **
> >
> >
> >
> > ----- Forwarded Message -----
> > *From:* Leslie S Satenstein via gnome-shell-list
> > <gnome-shell-list gnome org>
> > *To:* Florian Müllner <fmuellner gnome org>; Gnome-shell-list
> > <gnome-shell-list gnome org>
> > *Sent:* Wednesday, October 4, 2017 6:16 PM
> > *Subject:* Gnome extensions
> >
> > Hi Florian
> >
> > I'm using a few of your Gnome extensions.  I thank you for providing
> > them to the community. 
> >
> > I do have a question for you regarding the gnome-shell.
> >
> > I have extensions (several that include yours), where the
> installation
> > (doing the settings) onto *a btrfs* file system crashes the shell, or
> > causes the shell to go into a 99.9% cpu loop.  If I install these
> > extensions onto a non btrfs system, eg, ext4, lvm, xfs ,   the
> > installation and extension setup works flawlessly. 
> >
> > I use most of your extensions, that come globally with Fedora Linux
> > (currently using the Fedora beta 1.5, the pending go-live beta). I am
> > using it fully with btrfs.  I can crash the shell with one or two
> > extensions, only if the underlying file system is btrfs
> >
> > As the gnome-shell gets maintenance updates, I am see fewer and fewer
> > crashes, but not with btrfs. The crashes only occur during parameter
> > setup. It seems that the gnome-shell does not wrongly read the
> > compiled schema or ignores the compiled schema.  Have you stress
> > tested Gnome-shell under btrfs?  
> >
> > My preferred third party extension that works perfectly with ext4 and
> > xfs is TaskBar by Zpydr. I am walking through the source code and
> with
> > my level of JS knowledge, find no errors. Setting TaskBar up onto a
> > btrfs system crashes the shell, but on logging in after a crash, I
> see
> > settings outside of the schema settings.  After a few crashes, when
> > the settings are what I wanted, every extension works as
> anticipated. 
> > By the way, I am not the author of this extension.  The author
> appears
> > to have abandoned his offering.  What is his extension and one or two
> > others exercising that cause this grief.
> >  
> >  I am wondering if recompiling the schemas while under btrfs would
> > make a difference. I will give it a try.   
> >
> >
> >
> >  
> >
> >
> > gnome-shell-list mailing list
> > gnome-shell-list gnome org <mailto:gnome-shell-list gnome org>
> > https://mail.gnome.org/mailman/listinfo/gnome-shell-list
> >
> >
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> >
> >
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