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Subject: Re: [Fwd: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4]
From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Florian Schmidt <mista.tapas@gmx.net>,
       Paul Davis <paul@linuxaudiosystems.com>,
       Thomas Gleixner <tglx@linutronix.de>,
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       Fernando Pablo Lopez-Lezcano <nando@ccrma.stanford.edu>,
       Karsten Wiese <annabellesgarden@yahoo.de>,
       jackit-devel <jackit-devel@lists.sourceforge.net>,
       Rui Nuno Capela <rncbc@rncbc.org>
In-Reply-To: <20041029212545.GA13199@elte.hu>
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Date: Fri, 29 Oct 2004 21:15:36 -0400
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On Fri, 2004-10-29 at 23:25 +0200, Ingo Molnar wrote:
> this particular one (atomicity-checking) is always-enabled if you have
> the -RT patch applied (it's a really cheap check).

I get these as well.  Basically I think these are the exact same results
Florian had.

jackd:1646 userspace BUG: scheduling in user-atomic context!
 [<c02733eb>] schedule+0x6b/0xf0 (8)
 [<c027431d>] _down_write+0xcd/0x130 (24)
 [<c0111e1e>] lock_kernel+0x1e/0x30 (32)
 [<c01e7ad9>] tty_write+0x189/0x240 (16)
 [<c01ecf20>] write_chan+0x0/0x210 (28)
 [<c014ea4a>] vfs_write+0xba/0x100 (32)
 [<c014eb3d>] sys_write+0x3d/0x70 (36)
 [<c0105d07>] syscall_call+0x7/0xb (40)
jackd:1646 userspace BUG: scheduling in user-atomic context!
 [<c02733eb>] schedule+0x6b/0xf0 (8)
 [<c027431d>] _down_write+0xcd/0x130 (24)
 [<c0111e1e>] lock_kernel+0x1e/0x30 (32)
 [<c01e7ad9>] tty_write+0x189/0x240 (16)
 [<c01ecf20>] write_chan+0x0/0x210 (28)
 [<c014ea4a>] vfs_write+0xba/0x100 (32)
 [<c014eb3d>] sys_write+0x3d/0x70 (36)
 [<c0105d07>] syscall_call+0x7/0xb (40)

A known issue with JACK is that it prints from the realtime thread.  I
think someone might have posted a fix for this recently.

Lee

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