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Groups > linux.debian.kernel > #94309 > unrolled thread
| Started by | Jan Dittberner <jandd@debian.org> |
|---|---|
| First post | 2026-10-01 17:30 +0200 |
| Last post | 2026-10-01 17:30 +0200 |
| Articles | 1 — 1 participant |
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Bug#1089569: Adding efi=runtime to kernel command line helps, but may cause latency spikes Jan Dittberner <jandd@debian.org> - 2026-10-01 17:30 +0200
| From | Jan Dittberner <jandd@debian.org> |
|---|---|
| Date | 2026-10-01 17:30 +0200 |
| Subject | Bug#1089569: Adding efi=runtime to kernel command line helps, but may cause latency spikes |
| Message-ID | <NJqTn-2W1U-1@gated-at.bofh.it> |
I just found out that you can add
efi=runtime
to the kernel command line if you need efivarfs using rt kernels. It is
documented in
https://docs.kernel.org/core-api/real-time/kernel-configuration.html that
CONFIG_PREEMPT_RT also sets CONFIG_EFI_DISABLE_RUNTIME because calling into
EFI can cause significant latency spikes.
Best regards
Jan
--
Jan Dittberner - Debian Developer
GPG-key: 4096R/0xA73E0055558FB8DD 2009-05-10
B2FF 1D95 CE8F 7A22 DF4C F09B A73E 0055 558F B8DD
https://portfolio.debian.net/ - https://people.debian.org/~jandd/
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