linux-kernel - [PATCH v1 2/2] PM: sleep: Refine error message in try_to_freeze

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Date:   Thu, 01 Dec 2022 19:34:44 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux PM <linux-pm@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Thomas Weißschuh <linux@...ssschuh.net>,
        Petr Mladek <pmladek@...e.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Joe Perches <joe@...ches.com>,
        Todd Brandt <todd.e.brandt@...ux.intel.com>
Subject: [PATCH v1 2/2] PM: sleep: Refine error message in try_to_freeze_tasks()

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

A previous change amended try_to_freeze_tasks() with the "what"
variable pointing to a string describing the group of tasks subject to
the freezing which may be used in the error message in there too, so
make that happen.

Accordingly, update sleepgraph.py to catch the modified error message
as appropriate.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 kernel/power/process.c             |    4 ++--
 tools/power/pm-graph/sleepgraph.py |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

Index: linux-pm/kernel/power/process.c
===================================================================
--- linux-pm.orig/kernel/power/process.c
+++ linux-pm/kernel/power/process.c
@@ -86,8 +86,8 @@ static int try_to_freeze_tasks(bool user
 	elapsed_msecs = ktime_to_ms(elapsed);
 
 	if (todo) {
-		pr_err("Freezing of tasks %s after %d.%03d seconds "
-		       "(%d tasks refusing to freeze, wq_busy=%d):\n",
+		pr_err("Freezing %s %s after %d.%03d seconds "
+		       "(%d tasks refusing to freeze, wq_busy=%d):\n", what,
 		       wakeup ? "aborted" : "failed",
 		       elapsed_msecs / 1000, elapsed_msecs % 1000,
 		       todo - wq_busy, wq_busy);
Index: linux-pm/tools/power/pm-graph/sleepgraph.py
===================================================================
--- linux-pm.orig/tools/power/pm-graph/sleepgraph.py
+++ linux-pm/tools/power/pm-graph/sleepgraph.py
@@ -1462,7 +1462,7 @@ class Data:
 		'TIMEOUT' : r'(?i).*\bTIMEOUT\b.*',
 		'ABORT'   : r'(?i).*\bABORT\b.*',
 		'IRQ'     : r'.*\bgenirq: .*',
-		'TASKFAIL': r'.*Freezing of tasks *.*',
+		'TASKFAIL': r'.*Freezing .*after *.*',
 		'ACPI'    : r'.*\bACPI *(?P<b>[A-Za-z]*) *Error[: ].*',
 		'DISKFULL': r'.*\bNo space left on device.*',
 		'USBERR'  : r'.*usb .*device .*, error [0-9-]*',