* 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] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 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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