[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1318616873-26739-2-git-send-email-acme@infradead.org>
Date: Fri, 14 Oct 2011 15:27:49 -0300
From: Arnaldo Carvalho de Melo <acme@...radead.org>
To: Ingo Molnar <mingo@...e.hu>
Cc: linux-kernel@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Mike Galbraith <efault@....de>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <peterz@...radead.org>,
Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 1/5] perf hists browser: Invalidate ui_browser->top after timer calls
From: Arnaldo Carvalho de Melo <acme@...hat.com>
With underlying dynamic data structures we need to invalidate pointers
to them after a timer, as that entry may have vanished (decayed in top,
for instance).
I forgot about browser_ui->top. Fix it by resetting it to null after a
timer. The seek operation from SEEK_SET will then set it to a valid
entry because it starts from rb_first(&hists->entries).
Reported-by: Ingo Molnar <mingo@...e.hu>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-2ssjm0ouh9tsz4dwkcu7c40n@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/util/ui/browser.c | 1 +
tools/perf/util/ui/browsers/hists.c | 15 +++++++++++++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/ui/browser.c b/tools/perf/util/ui/browser.c
index 2923c49..078ceaf 100644
--- a/tools/perf/util/ui/browser.c
+++ b/tools/perf/util/ui/browser.c
@@ -249,6 +249,7 @@ void ui_browser__update_nr_entries(struct ui_browser *browser, u32 nr_entries)
browser->top_idx += offset;
}
+ browser->top = NULL;
browser->seek(browser, browser->top_idx, SEEK_SET);
}
diff --git a/tools/perf/util/ui/browsers/hists.c b/tools/perf/util/ui/browsers/hists.c
index 4a3a7c9..b144b10 100644
--- a/tools/perf/util/ui/browsers/hists.c
+++ b/tools/perf/util/ui/browsers/hists.c
@@ -600,14 +600,23 @@ static int hist_browser__show_entry(struct hist_browser *self,
return printed;
}
+static void ui_browser__hists_init_top(struct ui_browser *browser)
+{
+ if (browser->top == NULL) {
+ struct hist_browser *hb;
+
+ hb = container_of(browser, struct hist_browser, b);
+ browser->top = rb_first(&hb->hists->entries);
+ }
+}
+
static unsigned int hist_browser__refresh(struct ui_browser *self)
{
unsigned row = 0;
struct rb_node *nd;
struct hist_browser *hb = container_of(self, struct hist_browser, b);
- if (self->top == NULL)
- self->top = rb_first(&hb->hists->entries);
+ ui_browser__hists_init_top(self);
for (nd = self->top; nd; nd = rb_next(nd)) {
struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
@@ -659,6 +668,8 @@ static void ui_browser__hists_seek(struct ui_browser *self,
if (self->nr_entries == 0)
return;
+ ui_browser__hists_init_top(self);
+
switch (whence) {
case SEEK_SET:
nd = hists__filter_entries(rb_first(self->entries));
--
1.6.2.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists