Re: efivarfs_set_variable: writing to fd 8 failed
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....
--
Steve McIntyre, Cambridge, UK. steve@einval.com
"Arguing that you don't care about the right to privacy because you have
nothing to hide is no different than saying you don't care about free
speech because you have nothing to say."
-- Edward Snowden
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