5.4-stable review patch. If anyone has any objections, please let me know.
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From: Arnaldo Carvalho de Melo acme@redhat.com
[ Upstream commit 1741189d843a1d5ef38538bc52a3760e2e46cb2e ]
In 7cecb7fe8388d5c3 ("perf hists: Move sort__has_comm into struct perf_hpp_list") it assumes that act->thread is set prior to calling do_zoom_thread().
This doesn't happen when we use ESC or the Left arrow key to Zoom out of a specific thread, making this operation not to work and we get stuck into the thread zoom.
In 6422184b087ff435 ("perf hists browser: Simplify zooming code using pstack_peek()") it says no need to set actions->thread, and at that point that was true, but in 7cecb7fe8388d5c3 a actions->thread == NULL check was added before the zoom out of thread could kick in.
We can zoom out using the alternative 't' thread zoom toggle hotkey to finally set actions->thread before calling do_zoom_thread() and zoom out, but lets also fix the ESC/Zoom out of thread case.
Fixes: 7cecb7fe8388d5c3 ("perf hists: Move sort__has_comm into struct perf_hpp_list") Reported-by: Ingo Molnar mingo@kernel.org Tested-by: Ingo Molnar mingo@kernel.org Cc: Adrian Hunter adrian.hunter@intel.com Cc: Ian Rogers irogers@google.com Cc: James Clark james.clark@linaro.org Cc: Jiri Olsa jolsa@kernel.org Cc: Kan Liang kan.liang@linux.intel.com Cc: Namhyung Kim namhyung@kernel.org Link: https://lore.kernel.org/r/Z_TYux5fUg2pW-pF@gmail.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/ui/browsers/hists.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index 3461fa8cf4400..2a38140391c44 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -3065,10 +3065,10 @@ static int perf_evsel__hists_browse(struct evsel *evsel, int nr_events, /* * No need to set actions->dso here since * it's just to remove the current filter. - * Ditto for thread below. */ do_zoom_dso(browser, actions); } else if (top == &browser->hists->thread_filter) { + actions->thread = thread; do_zoom_thread(browser, actions); } else if (top == &browser->hists->socket_filter) { do_zoom_socket(browser, actions);