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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:

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:

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.

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

The configuration item CONFIG_BLK_DEV_IO_TRACE:

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.

Hardware

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