linux-kernel - Re: [ANNOUNCE] 2.6.31-rt11

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Date:	Tue, 22 Sep 2009 14:01:13 -0500
From:	Clark Williams <williams@...hat.com>
To:	Darren Hart <dvhltc@...ibm.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	rt-users <linux-rt-users@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Carsten Emde <ce@...g.ch>,
	Frank Rowand <frank.rowand@...sony.com>,
	Robin Gareus <robin@...eus.org>,
	Gregory Haskins <ghaskins@...ell.com>,
	Philippe Reynes <philippe.reynes@...smpp.fr>,
	Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU>,
	Will Schmidt <will_schmidt@...t.ibm.com>,
	Jan Blunck <jblunck@...e.de>,
	Sven-Thorsten Dietrich <sdietrich@...ell.com>,
	Jon Masters <jcm@...hat.com>,
	Mark Knecht <markknecht@...il.com>
Subject: Re: [ANNOUNCE] 2.6.31-rt11

On Tue, 22 Sep 2009 11:31:51 -0700
Darren Hart <dvhltc@...ibm.com> wrote:

> Thomas Gleixner wrote:
> > We are pleased to announce the next update to our new preempt-rt
> > series.
> > 
> >    - latencytop fix
> > 
> >    - disable SPARSE_IRQ, DMAR, IRQ_REMAP for -rt
> > 
> > Known issues:
> >    - ARM highmem
> >    - scheduler load balancing oddities. Peter is working on it.
> >    - timer_interrupt hang check (still working on somthing useful)
> > 
> > The planned "add back MIPS support" is postponed to rt12.
> > 
> > Download locations:
> > 
> >     http://rt.et.redhat.com/download/
> >     http://www.kernel.org/pub/linux/kernel/projects/rt/
> > 
> > Git release branch:
> >     git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git rt/2.6.31
> >   
> > Git development branch:
> >     git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git rt/head
> > 
> > Gitweb:
> >     http://git.kernel.org/?p=linux/kernel/git/tip/linux-2.6-tip.git;a=shortlog;h=rt/2.6.31
> > 
> > Information on the RT patch can be found at:
> > 
> >     http://rt.wiki.kernel.org/index.php/Main_Page
> > 
> > to build the 2.6.31-rt11 tree, the following patches should be
> > applied:
> > 
> >     http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.31.tar.bz2
> >     http://www.kernel.org/pub/linux/kernel/projects/rt/patch-2.6.31-rt11.bz2
> > 
> > Enjoy !
> > 
> >       tglx
> > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> Hitting a repeating BUG at boot on my Thinkpad T60p:
> 
> [    2.861699] BUG: sleeping function called from invalid context at 
> kernel/rtmutex.c:684
> [    2.861839] in_atomic(): 1, irqs_disabled(): 0, pid: 777, name: sleep
> [    2.861967] Pid: 777, comm: sleep Not tainted 2.6.31-rc4-rt1-dvh01 #1
> [    2.862092] Call Trace:
> [    2.862217]  [<c012d881>] __might_sleep+0xe1/0x100
> [    2.862343]  [<c056ccba>] rt_spin_lock+0x2a/0x70
> [    2.862468]  [<c018243a>] res_counter_uncharge+0x2a/0x50
> [    2.862593]  [<c01e6e23>] __mem_cgroup_uncharge_common+0x93/0x190
> [    2.862720]  [<c01e6fb8>] mem_cgroup_uncharge_page+0x28/0x30
> [    2.862845]  [<c01d6b87>] page_remove_rmap+0x47/0x50
> [    2.862969]  [<c01cf2d9>] unmap_vmas+0x349/0x6b0
> [    2.863093]  [<c01d45e5>] exit_mmap+0xc5/0x1c0
> [    2.863217]  [<c0140481>] mmput+0x51/0xc0
> [    2.863339]  [<c0146465>] exit_mm+0x105/0x140
> [    2.863462]  [<c01465b5>] do_exit+0x115/0x760
> [    2.863584]  [<c0146cc4>] sys_exit+0x14/0x20
> [    2.863707]  [<c0103025>] syscall_call+0x7/0xb
> 
> I'm looking for a problem with preempt_disable() between LinuxCon 
> seesions now.  But if someone already knows the problem, thought I'd post.
> 
> Thanks,

I saw that (or something very similar) on my T60 a couple of versions
back but thought it got fixed. Send me your .config, will you?

Clark

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