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commit0feba17bd7upstream. We observed an issue that was some extra columns displayed after switching perf data file in browser. The steps to reproduce: 1. perf record -a -e cycles,instructions -- sleep 3 2. perf report --group 3. In browser, we use hotkey 's' to switch to another perf.data 4. Now in browser, the extra columns 'Self' and 'Children' are displayed. The issue is setup_sorting() executed again after repeat path, so dimensions are added again. This patch checks the last key returned from __cmd_report(). If it's K_SWITCH_INPUT_DATA, skips the setup_sorting(). Fixes:ad0de0971b("perf report: Enable the runtime switching of perf data file") Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Feng Tang <feng.tang@intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20191220013722.20592-1-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.