linux-kernel - RE: [PATCH 1/1] PM: Thaws refrigerated and to be exited kernel threads

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Date:	Mon, 9 Nov 2009 14:48:09 +0530
From:	"Dasgupta, Romit" <romit@...com>
To:	Pavel Machek <pavel@....cz>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...ts.linux-foundation.org" 
	<linux-pm@...ts.linux-foundation.org>
Subject: RE: [PATCH 1/1] PM: Thaws refrigerated and to be exited kernel
 threads

> Really? I believe the "ktrhead_should_stop" is new rule, and code does
> not seem to follow it. Actually, for example audit does not seem to
> use kthread_should_stop() at all...
> 
> ./kernel/rtmutex-tester.c-
> ./kernel/rtmutex-tester.c-		/* Wait for the next 
> command to be executed */
> ./kernel/rtmutex-tester.c-		schedule();
> ./kernel/rtmutex-tester.c:		try_to_freeze();
> ./kernel/rtmutex-tester.c-
> ./kernel/rtmutex-tester.c-		if (signal_pending(current))
> ./kernel/rtmutex-tester.c-			flush_signals(current);
> --
Not a new rule. For these threads you listed no one stops them by sending 
'kthread_stop' so the problem does not arise! But for the threads that are 
stopped by invoking kthread_stop they do check kthread_should_stop. --
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