RE: efivarfs_set_variable: writing to fd 8 failed
> -----Original Message-----
> From: Steve McIntyre <steve@einval.com>
> Sent: Thursday, January 9, 2020 2:55 PM
> To: Limonciello, Mario
> Cc: junky@mail.sheugh.com; debian-efi@lists.debian.org
> Subject: Re: efivarfs_set_variable: writing to fd 8 failed
>
>
> [EXTERNAL EMAIL]
>
> On Thu, Jan 09, 2020 at 08:50:54PM +0000, Mario.Limonciello@dell.com wrote:
> >>
> >> On Thu, Jan 09, 2020 at 06:33:14PM +0000, junky@mail.sheugh.com wrote:
> >> >On Wed, Jan 08, 2020 at 04:04:40PM +0000, Steve McIntyre wrote:
> >> >> [ Re-adding the cc to the debian-efi list - please respond there
> >> >> too... ]
> >> >>
> >> >> On Sat, Jan 04, 2020 at 10:55:51PM +0000, junky@mail.sheugh.com wrote:
> >> >> >> On Sat, Dec 28, 2019 at 03:39:32PM +0000, junky@mail.sheugh.com
> wrote:
> >> >> >> >Dear Maintainer,
> >> >> >> >
> >> >
> >> >> Sorry, I possibly wasn't clear enough. For UEFI, the NVRAM is normally
> >> >> an entirely separate set of storage (typically a flash chip) managed
> >> >> by the motherboard's firmware. It's nothing to do with your SSD or
> >> >> hard drive, it's more like an updated version of how BIOS settings
> >> >> used to be stored.
> >> >>
> >> >> One possible culprit here could be error logs stored in
> >> >> /sys/fs/pstore/ taking up lots of space. Could you check and see if
> >> >> you have any files there please?
> >> >
> >> >Best guess : 200 files of less than 2K each in /sys/fs/pstore
> >>
> >> Bah. :-( If you look at the filenames, you'll probably find that
> >> they're named something similar to the following:
> >>
> >> /sys/fs/pstore/dmesg-erst-6661505009219272707.enc.z
> >>
> >> (which is on one of my systems locally). The kernel can sometimes drop
> >> error logs there, but doesn't clean them up. If you remove the files
> >> yourself, then that should clear the space and fix your problem.
> >>
> >
> >Given how small the pstore is, if the kernel has a tendency to directly drop files
> >here I think it makes perfect sense to have some process on the system
> >that regularly moves them out to somewhere else. Probably not only for
> >Debian but as a general statement.
> >
> >Maybe something like systemd should prune on bootup and append to a previous
> >boot log for example.
>
> There is a systemd thing for exactly this!
>
> https://www.freedesktop.org/software/systemd/man/systemd-pstore.html
>
> But I'm not sure if it'e enabled by default....
>
> --
Well that's wonderful! It looks like unless the behavior has been compiled differently
it should automatically be evicting stuff according to the docs (https://www.freedesktop.org/software/systemd/man/pstore.conf.html#)
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