linux-kernel - Re: Cannot add new efi boot entry

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Date:	Mon, 22 Apr 2013 12:07:15 +0100
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Jiri Slaby <jslaby@...e.cz>
CC:	joeyli <jlee@...e.com>, matthew.garrett@...ula.com,
	cbouatmailru@...il.com, ccross@...roid.com, keescook@...omium.org,
	Tony Luck <tony.luck@...el.com>, linux-efi@...r.kernel.org,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: Cannot add new efi boot entry

On 20/04/13 08:40, Jiri Slaby wrote:
> On 04/18/2013 08:07 PM, Jiri Slaby wrote:
>> On 04/17/2013 04:51 PM, Matt Fleming wrote:
>>> On 17/04/13 15:29, Jiri Slaby wrote:
>>>> On 04/16/2013 12:11 PM, Matt Fleming wrote:
>>>>> On 16/04/13 10:56, joeyli wrote:
>>>>>> I think I just got the same situation on my side with Acer machine. I am
>>>>>> trying Matthew's new patchset hope can avoid this situation:
>>>>>>
>>>>>> https://lkml.org/lkml/2013/4/15/473
>>>>>
>>>>> Please do let us know whether the patches work for you.
>>>>
>>>> Hmm, where did efi_query_variable_store in 3/3 come from?
>>>
>>> It's in a patch on the 'urgent' branch at,
>>>
>>>     git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git
>>
>> The 3 patches plus that one work for me.
> 
> Actually they don't :(:
> open("/sys/firmware/efi/vars/new_var", O_WRONLY) = 3
> write(3,
> "B\0o\0o\0t\0000\0000\0001\0003\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
> 2084) = -1 ENOSPC (No space left on device)
> close(3)                                = 0

Thanks for testing Jiri.

You can disable the EFI storage checks in -rc8 by using the
efi_no_storage_paranoia kernel parameter, but it's only recommended to
do that if you machine ends up in these kinds of situations where
garbage collection isn't be initiated, or your machine ships with > 50%
of the variable store in use from the factory.

Matthew, what kind of info do you need from Jiri to improve the storage
limit algorithm?

-- 
Matt Fleming, Intel Open Source Technology Center
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