* EFI and RT incompatible?
@ 2019-04-02 8:38 Mart van de Wege
2019-04-02 13:23 ` Julien Grall
0 siblings, 1 reply; 3+ messages in thread
From: Mart van de Wege @ 2019-04-02 8:38 UTC (permalink / raw)
To: linux-rt-users@vger.kernel.org
Hi,
I compiled 5.0.5-rt3 last week, and after rebooting I found that
efivarfs failed to mount. Loading the efivarfs module gave me
a 'device not found' error.
Rebooting into 5.0.0 (no rt) and efivarfs automounted as usual.
Trouble is, I have no experience with bisecting between two different
branches, so I have no clue on how to start debugging this. Anybody
want to throw me some pointers?
Mart
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: EFI and RT incompatible?
2019-04-02 8:38 EFI and RT incompatible? Mart van de Wege
@ 2019-04-02 13:23 ` Julien Grall
2019-04-02 13:40 ` Mart van de Wege
0 siblings, 1 reply; 3+ messages in thread
From: Julien Grall @ 2019-04-02 13:23 UTC (permalink / raw)
To: Mart van de Wege, linux-rt-users@vger.kernel.org
On 02/04/2019 09:38, Mart van de Wege wrote:
> Hi,
Hello Mart,
>
> I compiled 5.0.5-rt3 last week, and after rebooting I found that
> efivarfs failed to mount. Loading the efivarfs module gave me
> a 'device not found' error.
>
> Rebooting into 5.0.0 (no rt) and efivarfs automounted as usual.
>
> Trouble is, I have no experience with bisecting between two different
> branches, so I have no clue on how to start debugging this. Anybody
> want to throw me some pointers?
Linux-rt is disabling EFI runtime by default because it may increase the latency
of the system (see [1] for more details).
You can override the behavior by adding "efi=runtime" on your kernel command line.
Cheers,
[1] https://marc.info/?l=linux-rt-users&m=155379809327926&w=2
>
> Mart
>
--
Julien Grall
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: EFI and RT incompatible?
2019-04-02 13:23 ` Julien Grall
@ 2019-04-02 13:40 ` Mart van de Wege
0 siblings, 0 replies; 3+ messages in thread
From: Mart van de Wege @ 2019-04-02 13:40 UTC (permalink / raw)
To: Julien Grall, Mart van de Wege, linux-rt-users@vger.kernel.org
On Tue, 2019-04-02 at 14:23 +0100, Julien Grall wrote:
> Linux-rt is disabling EFI runtime by default because it may increase
> the latency of the system (see [1] for more details).
>
> You can override the behavior by adding "efi=runtime" on your kernel
> command line.
>
Yeah, I saw the 22/3 thread too late.
Thanks anyway,
Mart
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-04-02 13:49 UTC | newest]
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2019-04-02 8:38 EFI and RT incompatible? Mart van de Wege
2019-04-02 13:23 ` Julien Grall
2019-04-02 13:40 ` Mart van de Wege
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