diff options
| author | Iwata Koki <iwata.koki@fujitsu.com> | 2026-07-06 14:05:34 +0900 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2026-07-15 10:51:28 -0600 |
| commit | acfee2292bc2c1b684b40c3566cfbd5ccd4fd775 (patch) | |
| tree | 68c5648216d9ceead35f5d0b2402efa5181e2adb | |
| parent | 75f7551b073cc164f2837490490d13beac663ee0 (diff) | |
| download | linux-stable-acfee2292bc2c1b684b40c3566cfbd5ccd4fd775.tar.gz linux-stable-acfee2292bc2c1b684b40c3566cfbd5ccd4fd775.zip | |
Documentation: admin-guide: fix a doc for efi_no_storage_paranoia the "5KB" instead of the "50%"
The documentation for 'efi_no_storage_paranoia' incorrectly states
the kernel cannot use "more than 50%" of the EFI variable storage.
This percentage-based explanation has been outdated since commit
f8b8404337de ("Modify UEFI anti-bricking code") introduced a fixed 5KB
minimum reserve threshold (EFI_MIN_RESERVE) in
arch/x86/platform/efi/quirks.c. At that time, the documentation was not
updated to reflect this change.
Update the documentation to reflect the "5KB" instead of the "50%".
Signed-off-by: Koki Iwata <iwata.koki@fujitsu.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260706050534.1653916-1-iwata.koki@fujitsu.com>
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 00fba6d1c66e..a77bf353c802 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1614,10 +1614,17 @@ Kernel parameters on all PCI bridges while in the EFI boot stub efi_no_storage_paranoia [EFI,X86,EARLY] - Using this parameter you can use more than 50% of - your efi variable storage. Use this parameter only if - you are really sure that your UEFI does sane gc and - fulfills the spec otherwise your board may brick. + The kernel reserves 5KB of EFI variable storage for + safety, because some UEFI implementation may fail to + boot if there's insufficient space in the EFI variable + storage. + + Using this parameter, you can use the 5KB reservation + in the EFI variable storage. + + However, Use this parameter only if you are really + sure that your UEFI does sane gc and fulfills the spec + otherwise your board may brick. efivar_ssdt= [EFI; X86] Name of an EFI variable that contains an SSDT that is to be dynamically loaded by Linux. If there are |