From: Lee Revell <rlrevell@joe-job.com>
To: "Jack O'Quin" <joq@io.com>
Cc: Florian Schmidt <mista.tapas@gmx.net>,
Andrew Burgess <aab@cichlid.com>,
linux-kernel@vger.kernel.org, jackit-devel@lists.sourceforge.net
Subject: Re: [Jackit-devel] Re: Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.31-19
Date: Thu, 02 Dec 2004 15:07:15 -0500 [thread overview]
Message-ID: <1102018036.31206.8.camel@krustophenia.net> (raw)
In-Reply-To: <87hdn4eihw.fsf@sulphur.joq.us>
On Thu, 2004-12-02 at 11:07 -0600, Jack O'Quin wrote:
> Is printk() guaranteed not to wait inside the kernel? I am not
> familiar with its internal implementation.
Yes. It just writes to a ring buffer and klogd dumps this to syslog.
So if you really start to spew printk's they don't all make it to the
log but you never get blocked.
The implementation probably looks a lot like a correct solution to fix
the printf-from-RT-context issue in JACK would.
Lee
next prev parent reply other threads:[~2004-12-02 20:07 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-02 15:46 Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.31-19 Andrew Burgess
2004-12-02 16:03 ` [Jackit-devel] " Florian Schmidt
2004-12-02 16:26 ` Jack O'Quin
2004-12-02 16:57 ` Florian Schmidt
2004-12-02 17:07 ` Jack O'Quin
2004-12-02 20:07 ` Lee Revell [this message]
2004-12-02 20:48 ` Jack O'Quin
2004-12-02 17:09 ` Florian Schmidt
2004-12-02 17:32 ` Jack O'Quin
2004-12-02 20:03 ` Florian Schmidt
2004-12-02 21:10 ` Florian Schmidt
2004-12-02 22:34 ` Bill Huey
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