The following commit has been merged into the x86/splitlock branch of tip: Commit-ID: 9d839c280b64817345c2fa462c0027a9bd742361 Gitweb: https://git.kernel.org/tip/9d839c280b64817345c2fa462c0027a9bd742361 Author: Fenghua Yu <fenghua.yu@xxxxxxxxx> AuthorDate: Mon, 19 Apr 2021 21:49:57 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitterDate: Tue, 18 May 2021 16:39:31 +02:00 Documentation/admin-guide: Add bus lock ratelimit Since bus lock rate limit changes the split_lock_detect parameter, update the documentation for the change. Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Reviewed-by: Tony Luck <tony.luck@xxxxxxxxx> Link: https://lore.kernel.org/r/20210419214958.4035512-4-fenghua.yu@xxxxxxxxx --- Documentation/admin-guide/kernel-parameters.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index cb89dbd..ca94624 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5283,6 +5283,14 @@ exception. Default behavior is by #AC if both features are enabled in hardware. + ratelimit:N - + Set system wide rate limit to N bus locks + per second for bus lock detection. + 0 < N <= 1000. + + N/A for split lock detection. + + If an #AC exception is hit in the kernel or in firmware (i.e. not while executing in user mode) the kernel will oops in either "warn" or "fatal"
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