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docs: admin-guide: add IGNORE_DIRS example for cscope

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The workload tracing guide shows how to build a cscope database by
running cscope command directly. The kernel build system also provides
a cscope target, which supports IGNORE_DIRS for excluding directories
from the generated database.

Mention make cscope and show how to exclude Documentation/ as an example.

Signed-off-by: Cheng-Han Wu <hank20010209@gmail.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260503101429.254394-5-hank20010209@gmail.com>
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Cheng-Han Wu 2026-05-03 18:14:29 +08:00 committed by Jonathan Corbet
parent 7fb658ede0
commit e27108800b
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Documentation/admin-guide/workload-tracing.rst
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@ -202,6 +202,15 @@ database. To get out of this mode press ctrl+d. -p option is used to
specify the number of file path components to display. -p10 is optimal
for browsing kernel sources.
Alternatively, the kernel build system can generate the cscope database::
make cscope
To exclude directories from the generated database, pass IGNORE_DIRS to
the cscope target. For example, to exclude Documentation/, run::
make IGNORE_DIRS="Documentation" cscope
What is perf and how do we use it?
==================================