CONFIG_BLK_DEV_IO_TRACE: Support for tracing block IO actions

General informations

The Linux kernel configuration item CONFIG_BLK_DEV_IO_TRACE has multiple definitions:

Support for tracing block IO actions found in kernel/trace/Kconfig

The configuration item CONFIG_BLK_DEV_IO_TRACE:

• prompt: Support for tracing block IO actions
• type: bool
• depends on: ( CONFIG_SYSFS ) && ( CONFIG_BLOCK )
• defined in kernel/trace/Kconfig
• found in Linux kernels: 2.6.33–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Say Y here if you want to be able to trace the block layer actions on a given queue. Tracing allows you to see any traffic happening on a block device queue. For more information (and the userspace support tools needed), fetch the blktrace tools from:

git://git.kernel.dk/blktrace.git

Tracing also is possible using the ftrace interface, e.g.:

echo 1 > /sys/block/sda/sda1/trace/enable echo blk > /sys/kernel/tracing/current_tracer cat /sys/kernel/tracing/trace_pipe

If unsure, say N.

Support for tracing block io actions found in kernel/trace/Kconfig

The configuration item CONFIG_BLK_DEV_IO_TRACE:

• prompt: Support for tracing block io actions
• type: bool
• depends on: ( CONFIG_SYSFS ) && ( CONFIG_BLOCK )
• defined in kernel/trace/Kconfig
• found in Linux kernels: 2.6.30–2.6.32

Help text

Say Y here if you want to be able to trace the block layer actions on a given queue. Tracing allows you to see any traffic happening on a block device queue. For more information (and the userspace support tools needed), fetch the blktrace tools from:

git://git.kernel.dk/blktrace.git

Tracing also is possible using the ftrace interface, e.g.:

echo 1 > /sys/block/sda/sda1/trace/enable echo blk > /sys/kernel/debug/tracing/current_tracer cat /sys/kernel/debug/tracing/trace_pipe

If unsure, say N.

Support for tracing block io actions found in block/Kconfig

The configuration item CONFIG_BLK_DEV_IO_TRACE:

• prompt: Support for tracing block io actions
• type: bool
• depends on: CONFIG_SYSFS
• defined in block/Kconfig
• found in Linux kernels: 2.6.17–2.6.29

Help text

Say Y here if you want to be able to trace the block layer actions on a given queue. Tracing allows you to see any traffic happening on a block device queue. For more information (and the userspace support tools needed), fetch the blktrace tools from:

git://git.kernel.dk/blktrace.git

If unsure, say N.

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The data is retrived from:

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• Linux Kernel Driver DataBase (LKDDb)

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