From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Clark Williams <williams@redhat.com>,
"Luis Claudio R. Goncalves" <lclaudio@uudg.org>,
John Kacur <jkacur@redhat.com>,
Ulrich Obergfell <uobergfe@redhat.com>
Subject: Re: [PATCH RT] kernel/hrtimer: be non-freezeable in cpu_chill()
Date: Wed, 19 Feb 2014 16:42:13 +0100 [thread overview]
Message-ID: <5304D0D5.3030802@linutronix.de> (raw)
In-Reply-To: <20140219102700.04de1195@gandalf.local.home>
On 02/19/2014 04:27 PM, Steven Rostedt wrote:
> Hmm, I wonder if this is because msleep() sets the tasks state to
> TASK_UNINTERRUPTIBLE, and hrtimer_nanosleep sets it to
> TASK_INTERRUPTIBLE.
No, it is because freezable_schedule() is called via do_nanosleep() in
hrtimer call path and msleep() calls schedule() without it.
Sebastian
prev parent reply other threads:[~2014-02-19 15:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-05 16:51 [PATCH RT] rt: Make cpu_chill() use hrtimer instead of msleep() Steven Rostedt
2014-02-05 16:57 ` Steven Rostedt
2014-02-07 11:30 ` Sebastian Andrzej Siewior
2014-02-07 14:08 ` Steven Rostedt
2014-02-07 14:13 ` Steven Rostedt
2014-02-07 14:21 ` Sebastian Andrzej Siewior
2014-02-19 11:53 ` [PATCH RT] kernel/hrtimer: be non-freezeable in cpu_chill() Sebastian Andrzej Siewior
2014-02-19 15:27 ` Steven Rostedt
2014-02-19 15:42 ` Sebastian Andrzej Siewior [this message]
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