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Bug#853237: ENOSPC errors should be more helpful


On Mon, 30 Jan 2017 18:42:58 +0000 Steve McIntyre <steve@einval.com> wrote:
> Package: efibootmgr
> Version: 0.11.0-3
> Severity: important
> Tags: upstream
> Hi,
> I've seen a growing number of people reporting efibootmgr failing with
> ENOSPC when trying to add new boot entries, e.g. on grub-efi
> upgrades. It's a worrying trend, and users are ending up with
> unbootable systems (hence the severity).
> #852513 is a great example. Norbert has done an excellent job of
> investigating the problem (thankfully) and in his case this seems to
> be a problem with the pstore filling up. Maybe this is the cause of a
> number of these problems (e.g. #756253).
> With ENOSPC error, at the very least, we should:
>  * warn users that their system may fail to boot
>  * give some ideas on what might be the cause
>  * suggest ways to investigate and/or fix the problem
> We could even check for files in /sys/fs/pstore and complain if
> they're taking up too much space, maybe?

Other potential solutions:
 * Propose or silently remove dumps (generated via pstore), or maybe
leave only one dump
 * Avoid recreating entries if they are not changed or create the new
entries before removing the old ones (so if it fails, old ones are still

The dumps in pstore are kernel oops dumps.

I'm not sure if these are possible to implement or if they are good ones.

Alexis Murzeau
PGP: B7E6 0EBB 9293 7B06 BDBC  2787 E7BD 1904 F480 937F

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