linux-kernel - Re: [PATCH 0/3] sched/swait: Convert to full exclusive mode

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Message-Id: <20180619144956.GA23737@linux.vnet.ibm.com>
Date:   Tue, 19 Jun 2018 07:49:56 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     mingo@...nel.org, linux-kernel@...r.kernel.org,
        torvalds@...ux-foundation.org, tglx@...utronix.de,
        bigeasy@...utronix.de, oleg@...hat.com, pbonzini@...hat.com
Subject: Re: [PATCH 0/3] sched/swait: Convert to full exclusive mode

On Wed, Jun 13, 2018 at 06:27:42PM -0700, Paul E. McKenney wrote:
> On Tue, Jun 12, 2018 at 10:34:49AM +0200, Peter Zijlstra wrote:
> > As mentioned by Linus, swait is exclusive mode and had better behave like it
> > and be named like it.
> > 
> > Make it so.
> 
> Cool!
> 
> When I tried testing it on x86 against recent mainline, I got:
> 
> "WARNING: WARNING: Bad or missing .orc_unwind table.  Disabling unwinder."
> 
> But when I tested on recent mainline without your patches:
> 
> 	4597fcff0704 "Merge tag 'for-4.18/dm-changes-v2' of
> 	git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm"
> 
> I get the same warning.  Trying again on today's mainline, but in the
> meantime, is anyone else seeing this?

And this patch fixes this issue, FWIW:

https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1713797.html

							Thanx, Paul