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| author | Stijn Tintel <stijn@linux-ipv6.be> | 2021-11-06 20:55:57 +0200 |
|---|---|---|
| committer | Stijn Tintel <stijn@linux-ipv6.be> | 2021-11-15 03:13:43 +0200 |
| commit | 38106a484cdff85cd9b52bb2978c8b40f8b2c942 (patch) | |
| tree | 04df9dd8d85a99d33cfee05577996b67c0c4fdcc /config/Config-kernel.in | |
| parent | 5720ac8f4c0d17534a2cf8c9800c01fa7e2c785f (diff) | |
| download | upstream-38106a484cdff85cd9b52bb2978c8b40f8b2c942.tar.gz upstream-38106a484cdff85cd9b52bb2978c8b40f8b2c942.tar.bz2 upstream-38106a484cdff85cd9b52bb2978c8b40f8b2c942.zip | |
kernel: add missing symbol
Enabling KERNEL_FTRACE exposes the HIST_TRIGGERS triggers symbol. Add a
build option for it to fix build failures with KERNEL_FTRACE enabled.
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Diffstat (limited to 'config/Config-kernel.in')
| -rw-r--r-- | config/Config-kernel.in | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/config/Config-kernel.in b/config/Config-kernel.in index e993dc0d8c..8ebe1b7070 100644 --- a/config/Config-kernel.in +++ b/config/Config-kernel.in @@ -349,6 +349,19 @@ config KERNEL_PREEMPT_TRACER enabled. This option and the irqs-off timing option can be used together or separately.) +config KERNEL_HIST_TRIGGERS + bool "Histogram triggers" + depends on KERNEL_FTRACE + help + Hist triggers allow one or more arbitrary trace event fields to be + aggregated into hash tables and dumped to stdout by reading a + debugfs/tracefs file. They're useful for gathering quick and dirty + (though precise) summaries of event activity as an initial guide for + further investigation using more advanced tools. + + Inter-event tracing of quantities such as latencies is also + supported using hist triggers under this option. + config KERNEL_DEBUG_KERNEL bool default n |