diff options
| author | Marco Elver <elver@google.com> | 2025-12-22 16:00:06 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-01-14 22:16:20 -0800 |
| commit | 6ac166a0c8b8aca2a2d796aec1e3c110f4e3300d (patch) | |
| tree | 8e29019c69d4ead0eeea9225a445ca6e43257abc | |
| parent | aba744a2e4b23c2040e335db35c141b95915efbd (diff) | |
docs: kernel-parameters: add kfence parameters
Add a brief summary for KFENCE's kernel command-line parameters in
admin-guide/kernel-parameters.
Link: https://lkml.kernel.org/r/20251222150018.1349672-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index a8d0afde7f85..1058f2a6d6a8 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2917,6 +2917,41 @@ Kernel parameters for Movable pages. "nn[KMGTPE]", "nn%", and "mirror" are exclusive, so you cannot specify multiple forms. + kfence.burst= [MM,KFENCE] The number of additional successive + allocations to be attempted through KFENCE for each + sample interval. + Format: <unsigned integer> + Default: 0 + + kfence.check_on_panic= + [MM,KFENCE] Whether to check all KFENCE-managed objects' + canaries on panic. + Format: <bool> + Default: false + + kfence.deferrable= + [MM,KFENCE] Whether to use a deferrable timer to trigger + allocations. This avoids forcing CPU wake-ups if the + system is idle, at the risk of a less predictable + sample interval. + Format: <bool> + Default: CONFIG_KFENCE_DEFERRABLE + + kfence.sample_interval= + [MM,KFENCE] KFENCE's sample interval in milliseconds. + Format: <unsigned integer> + 0 - Disable KFENCE. + >0 - Enabled KFENCE with given sample interval. + Default: CONFIG_KFENCE_SAMPLE_INTERVAL + + kfence.skip_covered_thresh= + [MM,KFENCE] If pool utilization reaches this threshold + (pool usage%), KFENCE limits currently covered + allocations of the same source from further filling + up the pool. + Format: <unsigned integer> + Default: 75 + kgdbdbgp= [KGDB,HW,EARLY] kgdb over EHCI usb debug port. Format: <Controller#>[,poll interval] The controller # is the number of the ehci usb debug |