linux-kernel - Re: Soft lockup regression from today's sched.git merge.

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Message-Id: <200805070041.02618.rjw@sisk.pl>
Date:	Wed, 7 May 2008 00:41:01 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	David Miller <davem@...emloft.net>, mingo@...e.hu,
	linux-kernel@...r.kernel.org, tglx@...utronix.de
Subject: Re: Soft lockup regression from today's sched.git merge.

On Tuesday, 22 of April 2008, Peter Zijlstra wrote:
> On Tue, 2008-04-22 at 03:05 -0700, David Miller wrote:
> 
> > BTW, I'm also getting cpu's wedged in the group aggregate code:
> > 
> > [  121.338742] TSTATE: 0000009980001602 TPC: 000000000054ea20 TNPC: 0000000000456828 Y: 00000000    Not tainted
> > [  121.338778] TPC: <__first_cpu+0x4/0x28>
> > [  121.338791] g0: 0000000000000000 g1: 0000000000000002 g2: 0000000000000000 g3: 0000000000000002
> > [  121.338809] g4: fffff803fe9b24c0 g5: fffff8001587c000 g6: fffff803fe9d0000 g7: 00000000007b7260
> > [  121.338827] o0: 0000000000000002 o1: 00000000007b7258 o2: 0000000000000000 o3: 00000000007b7800
> > [  121.338845] o4: 0000000000845000 o5: 0000000000000400 sp: fffff803fe9d2ed1 ret_pc: 0000000000456820
> > [  121.338879] RPC: <aggregate_group_shares+0x10c/0x16c>
> > [  121.338893] l0: 0000000000000400 l1: 000000000000000d l2: 00000000000003ff l3: 0000000000000000
> > [  121.338911] l4: 0000000000000000 l5: 0000000000000000 l6: fffff803fe9d0000 l7: 0000000080009002
> > [  121.338928] i0: 0000000000801c20 i1: fffff800161ca508 i2: 00000000000001d8 i3: 0000000000000001
> > [  121.338946] i4: fffff800161d9c00 i5: 0000000000000001 i6: fffff803fe9d2f91 i7: 0000000000456904
> > [  121.338968] I7: <aggregate_get_down+0x84/0x13c>
> > 
> > I'm suspecting the deluge of cpumask changes that also went in today.
> > 
> > I guess I'll be bisecting all day tomorrow too :-/
> 
> Sadly both the cpumask changes and the group load-balancer came in the
> same batch - so its all new code. Also, it looks like the cpumask
> changes are before the load balance changes - so bisecting this will be
> 'fun'.

Can you please tell me what the current status of this is?

Rafael
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