linux-kernel - Re: 3.0-git15 Atomic scheduling in pidmap

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Message-ID: <20110818231646.GH2325@linux.vnet.ibm.com>
Date:	Thu, 18 Aug 2011 16:16:46 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Josh Boyer <jwboyer@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: 3.0-git15 Atomic scheduling in pidmap_init

On Thu, Aug 18, 2011 at 06:19:20PM -0400, Josh Boyer wrote:
> On Thu, Aug 18, 2011 at 02:23:34PM -0700, Paul E. McKenney wrote:
> > > > I am sorry, but I didn't make the rules!  And I must carry the fix
> > > > longer as well, if that makes you feel any better.
> > > 
> > > bah, we're not that anal.  The patch fixes a bug and prevents a nasty
> > > warning spew.  Please, send it to Linus.
> > 
> > Given your Acked-by and Josh's Tested-by I might consider it.  ;-)
> > 
> > Speaking of which, Josh, does this patch help Nicolas and Michal?
> 
> Yes, it did.  The bug is closed because I included the patch.  (I could
> recreate it myself as well.)

OK, good to know!

> > > We appear to be referring to the patch "rcu: Avoid having just-onlined
> > > CPU resched itself when RCU is idle"?  If so, the changelog doesn't
> > > even mention that the patch fixes a scheduling-while-atomic warning and
> > > the changelog fails to refer to the redhat bug report.  These omissions
> > > should be repaired, please.
> > 
> > OK...  But I cannot bring myself to believe that my fix does more than
> > hide some other bug.  Which is OK, I will just say that in the changelog.
> 
> I looked for this other bug myself for a while.  I couldn't find it.

Well, if there really is some other bug, it will make its continued
presence know soon enough.

Andrew, are you willing to ack this?

							Thanx, Paul
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