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2020-07-05Documentation: trace/histogram-design: drop doubled wordsRandy Dunlap1-2/+2
Drop the doubled words "to" and "the". Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Link: https://lore.kernel.org/r/20200703212453.30553-3-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-06-03tracing/doc: Fix ascii-art in histogram-design.rstTom Zanussi1-24/+24
This fixes the Sphinx parallel build error when building htmldocs: docutils.utils.SystemMessage: /home/sfr/next/next/Documentation/trace/histogram-design.rst:219: (SEVERE/4) Unexpected section title. It also fixes a bunch of other warnings I noticed when fixing the above, caused by mixing ascii-art and text. Link: https://lkml.kernel.org/r/69c291c76964642a417e5dd170d183ba6b552010.camel@kernel.org Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Tom Zanussi <zanussi@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-06-01tracing/doc: Fix typos in histogram-design.rstSteven Rostedt (VMware)1-3/+3
There's a few typos in the histogram-design.rst document that need need to be fixed. Cc: Tom Zanussi <zanussi@kernel.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-06-01tracing: Add histogram-design documentTom Zanussi1-0/+2115
Add a new Documentation/trace/histogram-design.rst file describing the ftrace histogram low-level design, meant to help developers trying to understand the internals when extending or making use of the hist triggers for higher-level tools. This documentation refers to the hist_debug files implemented by 'tracing: Add hist_debug trace event files for histogram debugging' so users wishing to try out the test examples here should make sure CONFIG_HIST_TRIGGERS_DEBUG is enabled. Link: http://lkml.kernel.org/r/256b29c3274bb89a10157c4a8d1a8bce7e74849e.1585941485.git.zanussi@kernel.org Signed-off-by: Tom Zanussi <zanussi@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>