Re: [tip:efi/core] efibc: Add EFI Bootloader Control module

From	Matt Fleming <matt@codeblueprint.co.uk>
Newsgroups	linux.kernel
Subject	Re: [tip:efi/core] efibc: Add EFI Bootloader Control module
Date	2016-04-30 22:10 +0200
Message-ID	<rtJnc-5lI-29@gated-at.bofh.it> (permalink)
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On Sat, 30 Apr, at 10:33:32AM, Jeremy Compostella wrote:
> Ingo Molnar <mingo@kernel.org> writes:
> >
> > Hm, can reboot notifiers do non-atomic allocations?
> The reboot notifier chain is a blocking notifier chain. AFAIK, it
> allows non-atomic allocation, right ?

I would assume so, yes.

> > Why is efivar_entry so huge?
> efivar_entry structure include two "big" arrays of 1024 bytes each for
> the EFI variable name and data.

Yeah. This is partially historical in that the EFI variable code has
always had these arrays.

But it's also that if you're dealing with EFI variables you always
want someplace to cache the data and name, so no one has ever proposed
to split out the data/name from struct efivar_entry.

We've never put them on the stack before either ;)

Thread

[tip:efi/core] efibc: Add EFI Bootloader Control module "tip-bot for Compostella, Jeremy" <tipbot@zytor.com> - 2016-04-28 12:50 +0200
  Re: [tip:efi/core] efibc: Add EFI Bootloader Control module Ingo Molnar <mingo@kernel.org> - 2016-04-29 12:00 +0200
    Re: [tip:efi/core] efibc: Add EFI Bootloader Control module Matt Fleming <matt@codeblueprint.co.uk> - 2016-04-29 12:40 +0200
      Re: [tip:efi/core] efibc: Add EFI Bootloader Control module jeremy.compostella@intel.com (Compostella, Jeremy) - 2016-04-29 13:40 +0200
        Re: [tip:efi/core] efibc: Add EFI Bootloader Control module Matt Fleming <matt@codeblueprint.co.uk> - 2016-04-29 14:20 +0200
          Re: [tip:efi/core] efibc: Add EFI Bootloader Control module jeremy.compostella@intel.com (Compostella, Jeremy) - 2016-04-29 16:00 +0200
            Re: [tip:efi/core] efibc: Add EFI Bootloader Control module Ingo Molnar <mingo@kernel.org> - 2016-04-29 21:50 +0200
              Re: [tip:efi/core] efibc: Add EFI Bootloader Control module jeremy.compostella@intel.com (Compostella, Jeremy) - 2016-04-30 10:40 +0200
                Re: [tip:efi/core] efibc: Add EFI Bootloader Control module Matt Fleming <matt@codeblueprint.co.uk> - 2016-04-30 22:10 +0200
            Re: [tip:efi/core] efibc: Add EFI Bootloader Control module Matt Fleming <matt@codeblueprint.co.uk> - 2016-04-30 22:10 +0200
              Re: [tip:efi/core] efibc: Add EFI Bootloader Control module jeremy.compostella@intel.com (Compostella, Jeremy) - 2016-05-02 10:00 +0200
                Re: [tip:efi/core] efibc: Add EFI Bootloader Control module Matt Fleming <matt@codeblueprint.co.uk> - 2016-05-03 16:50 +0200
    Re: [tip:efi/core] efibc: Add EFI Bootloader Control module Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-05-01 10:10 +0200
      Re: [tip:efi/core] efibc: Add EFI Bootloader Control module Matt Fleming <matt@codeblueprint.co.uk> - 2016-05-01 15:20 +0200

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